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Finding the Fourth Proportional to 8,861.78, 12,228.80 and 4,882.80

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Solution

The fourth proportional to 8,861.78, 12,228.80 and 4,882.80 is: 6,738.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,861.78 : 12,228.80 = 4,882.80 : x
  2. Step 2: Convert to fraction form
    8,861.78/12,228.80 = 4,882.80/x
  3. Step 3: Cross multiply
    8,861.78x = 12,228.80 × 4,882.80
  4. Step 4: Simplify right side
    8,861.78x = 59,710,784.64
  5. Step 5: Solve for x
    x = 59,710,784.64/8,861.78
  6. Step 6: Final answer
    x = 6,738.01

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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.