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Finding the Fourth Proportional to 20,006.80, 29,981.40 and 8,904.40

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Solution

The fourth proportional to 20,006.80, 29,981.40 and 8,904.40 is: 13,343.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,006.80 : 29,981.40 = 8,904.40 : x
  2. Step 2: Convert to fraction form
    20,006.80/29,981.40 = 8,904.40/x
  3. Step 3: Cross multiply
    20,006.80x = 29,981.40 × 8,904.40
  4. Step 4: Simplify right side
    20,006.80x = 266,966,378.16
  5. Step 5: Solve for x
    x = 266,966,378.16/20,006.80
  6. Step 6: Final answer
    x = 13,343.78

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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.