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Finding the Fourth Proportional to 20,425.59, 30,641.00 and 7,279.29

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Solution

The fourth proportional to 20,425.59, 30,641.00 and 7,279.29 is: 10,919.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,425.59 : 30,641.00 = 7,279.29 : x
  2. Step 2: Convert to fraction form
    20,425.59/30,641.00 = 7,279.29/x
  3. Step 3: Cross multiply
    20,425.59x = 30,641.00 × 7,279.29
  4. Step 4: Simplify right side
    20,425.59x = 223,044,688.49
  5. Step 5: Solve for x
    x = 223,044,688.49/20,425.59
  6. Step 6: Final answer
    x = 10,919.87

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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.