Home / 20,711.67-28,582.05-11,280.30

Finding the Fourth Proportional to 20,711.67, 28,582.05 and 11,280.30

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Solution

The fourth proportional to 20,711.67, 28,582.05 and 11,280.30 is: 15,566.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,711.67 : 28,582.05 = 11,280.30 : x
  2. Step 2: Convert to fraction form
    20,711.67/28,582.05 = 11,280.30/x
  3. Step 3: Cross multiply
    20,711.67x = 28,582.05 × 11,280.30
  4. Step 4: Simplify right side
    20,711.67x = 322,414,098.62
  5. Step 5: Solve for x
    x = 322,414,098.62/20,711.67
  6. Step 6: Final answer
    x = 15,566.78

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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.