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Finding the Fourth Proportional to 15,008.78, 20,714.97 and 9,895.31

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Solution

The fourth proportional to 15,008.78, 20,714.97 and 9,895.31 is: 13,657.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,008.78 : 20,714.97 = 9,895.31 : x
  2. Step 2: Convert to fraction form
    15,008.78/20,714.97 = 9,895.31/x
  3. Step 3: Cross multiply
    15,008.78x = 20,714.97 × 9,895.31
  4. Step 4: Simplify right side
    15,008.78x = 204,981,177.53
  5. Step 5: Solve for x
    x = 204,981,177.53/15,008.78
  6. Step 6: Final answer
    x = 13,657.42

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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.