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Finding the Fourth Proportional to 8,861.79, 12,229.26 and 4,882.89

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Solution

The fourth proportional to 8,861.79, 12,229.26 and 4,882.89 is: 6,738.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,861.79 : 12,229.26 = 4,882.89 : x
  2. Step 2: Convert to fraction form
    8,861.79/12,229.26 = 4,882.89/x
  3. Step 3: Cross multiply
    8,861.79x = 12,229.26 × 4,882.89
  4. Step 4: Simplify right side
    8,861.79x = 59,714,131.36
  5. Step 5: Solve for x
    x = 59,714,131.36/8,861.79
  6. Step 6: Final answer
    x = 6,738.38

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Find fourth proportional to 4,430.90, 6,114.63 and 2,441.45
Half scale
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Double scale
Find fourth proportional to 8,862.79, 12,230.64 and 4,883.89
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.