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Finding the Fourth Proportional to 20,471.08, 30,700.12 and 8,781.16

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Solution

The fourth proportional to 20,471.08, 30,700.12 and 8,781.16 is: 13,168.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,471.08 : 30,700.12 = 8,781.16 : x
  2. Step 2: Convert to fraction form
    20,471.08/30,700.12 = 8,781.16/x
  3. Step 3: Cross multiply
    20,471.08x = 30,700.12 × 8,781.16
  4. Step 4: Simplify right side
    20,471.08x = 269,582,665.74
  5. Step 5: Solve for x
    x = 269,582,665.74/20,471.08
  6. Step 6: Final answer
    x = 13,168.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.