Home / 15,691.43-21,654.34-8,617.85

Finding the Fourth Proportional to 15,691.43, 21,654.34 and 8,617.85

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Solution

The fourth proportional to 15,691.43, 21,654.34 and 8,617.85 is: 11,892.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,691.43 : 21,654.34 = 8,617.85 : x
  2. Step 2: Convert to fraction form
    15,691.43/21,654.34 = 8,617.85/x
  3. Step 3: Cross multiply
    15,691.43x = 21,654.34 × 8,617.85
  4. Step 4: Simplify right side
    15,691.43x = 186,613,789.06
  5. Step 5: Solve for x
    x = 186,613,789.06/15,691.43
  6. Step 6: Final answer
    x = 11,892.72

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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.