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Finding the Fourth Proportional to 20,375.71, 30,560.29 and 5,581.17

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Solution

The fourth proportional to 20,375.71, 30,560.29 and 5,581.17 is: 8,370.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,375.71 : 30,560.29 = 5,581.17 : x
  2. Step 2: Convert to fraction form
    20,375.71/30,560.29 = 5,581.17/x
  3. Step 3: Cross multiply
    20,375.71x = 30,560.29 × 5,581.17
  4. Step 4: Simplify right side
    20,375.71x = 170,562,312.26
  5. Step 5: Solve for x
    x = 170,562,312.26/20,375.71
  6. Step 6: Final answer
    x = 8,370.86

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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.