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Finding the Fourth Proportional to 29,572.62, 40,761.60 and 20,961.69

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Solution

The fourth proportional to 29,572.62, 40,761.60 and 20,961.69 is: 28,892.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,572.62 : 40,761.60 = 20,961.69 : x
  2. Step 2: Convert to fraction form
    29,572.62/40,761.60 = 20,961.69/x
  3. Step 3: Cross multiply
    29,572.62x = 40,761.60 × 20,961.69
  4. Step 4: Simplify right side
    29,572.62x = 854,432,023.10
  5. Step 5: Solve for x
    x = 854,432,023.10/29,572.62
  6. Step 6: Final answer
    x = 28,892.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.