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Finding the Fourth Proportional to 8,809.65, 12,157.22 and 4,830.75

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Solution

The fourth proportional to 8,809.65, 12,157.22 and 4,830.75 is: 6,666.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,809.65 : 12,157.22 = 4,830.75 : x
  2. Step 2: Convert to fraction form
    8,809.65/12,157.22 = 4,830.75/x
  3. Step 3: Cross multiply
    8,809.65x = 12,157.22 × 4,830.75
  4. Step 4: Simplify right side
    8,809.65x = 58,728,490.52
  5. Step 5: Solve for x
    x = 58,728,490.52/8,809.65
  6. Step 6: Final answer
    x = 6,666.38

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Find fourth proportional to 4,404.83, 6,078.61 and 2,415.38
Half scale
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Double scale
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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.