Home / 15,717.85-21,691.08-8,644.73

Finding the Fourth Proportional to 15,717.85, 21,691.08 and 8,644.73

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Solution

The fourth proportional to 15,717.85, 21,691.08 and 8,644.73 is: 11,929.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,717.85 : 21,691.08 = 8,644.73 : x
  2. Step 2: Convert to fraction form
    15,717.85/21,691.08 = 8,644.73/x
  3. Step 3: Cross multiply
    15,717.85x = 21,691.08 × 8,644.73
  4. Step 4: Simplify right side
    15,717.85x = 187,513,453.97
  5. Step 5: Solve for x
    x = 187,513,453.97/15,717.85
  6. Step 6: Final answer
    x = 11,929.97

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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.