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Finding the Fourth Proportional to 14,695.43, 20,279.76 and 7,981.10

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Solution

The fourth proportional to 14,695.43, 20,279.76 and 7,981.10 is: 11,013.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,695.43 : 20,279.76 = 7,981.10 : x
  2. Step 2: Convert to fraction form
    14,695.43/20,279.76 = 7,981.10/x
  3. Step 3: Cross multiply
    14,695.43x = 20,279.76 × 7,981.10
  4. Step 4: Simplify right side
    14,695.43x = 161,854,792.54
  5. Step 5: Solve for x
    x = 161,854,792.54/14,695.43
  6. Step 6: Final answer
    x = 11,013.95

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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.