Home / 15,718.40-21,691.22-8,644.92

Finding the Fourth Proportional to 15,718.40, 21,691.22 and 8,644.92

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Solution

The fourth proportional to 15,718.40, 21,691.22 and 8,644.92 is: 11,929.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,718.40 : 21,691.22 = 8,644.92 : x
  2. Step 2: Convert to fraction form
    15,718.40/21,691.22 = 8,644.92/x
  3. Step 3: Cross multiply
    15,718.40x = 21,691.22 × 8,644.92
  4. Step 4: Simplify right side
    15,718.40x = 187,518,861.60
  5. Step 5: Solve for x
    x = 187,518,861.60/15,718.40
  6. Step 6: Final answer
    x = 11,929.90

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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.