Home / 20,521.60-30,781.76-7,374.72

Finding the Fourth Proportional to 20,521.60, 30,781.76 and 7,374.72

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Solution

The fourth proportional to 20,521.60, 30,781.76 and 7,374.72 is: 11,061.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,521.60 : 30,781.76 = 7,374.72 : x
  2. Step 2: Convert to fraction form
    20,521.60/30,781.76 = 7,374.72/x
  3. Step 3: Cross multiply
    20,521.60x = 30,781.76 × 7,374.72
  4. Step 4: Simplify right side
    20,521.60x = 227,006,861.11
  5. Step 5: Solve for x
    x = 227,006,861.11/20,521.60
  6. Step 6: Final answer
    x = 11,061.85

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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.