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Finding the Fourth Proportional to 20,042.79, 30,070.98 and 8,957.13

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Solution

The fourth proportional to 20,042.79, 30,070.98 and 8,957.13 is: 13,438.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,042.79 : 30,070.98 = 8,957.13 : x
  2. Step 2: Convert to fraction form
    20,042.79/30,070.98 = 8,957.13/x
  3. Step 3: Cross multiply
    20,042.79x = 30,070.98 × 8,957.13
  4. Step 4: Simplify right side
    20,042.79x = 269,349,677.09
  5. Step 5: Solve for x
    x = 269,349,677.09/20,042.79
  6. Step 6: Final answer
    x = 13,438.73

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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.