Home / 15,718.12-21,691.36-8,644.92

Finding the Fourth Proportional to 15,718.12, 21,691.36 and 8,644.92

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Solution

The fourth proportional to 15,718.12, 21,691.36 and 8,644.92 is: 11,930.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,718.12 : 21,691.36 = 8,644.92 : x
  2. Step 2: Convert to fraction form
    15,718.12/21,691.36 = 8,644.92/x
  3. Step 3: Cross multiply
    15,718.12x = 21,691.36 × 8,644.92
  4. Step 4: Simplify right side
    15,718.12x = 187,520,071.89
  5. Step 5: Solve for x
    x = 187,520,071.89/15,718.12
  6. Step 6: Final answer
    x = 11,930.18

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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.