Home / 20,350.76-28,084.11-11,398.40

Finding the Fourth Proportional to 20,350.76, 28,084.11 and 11,398.40

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Solution

The fourth proportional to 20,350.76, 28,084.11 and 11,398.40 is: 15,729.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,350.76 : 28,084.11 = 11,398.40 : x
  2. Step 2: Convert to fraction form
    20,350.76/28,084.11 = 11,398.40/x
  3. Step 3: Cross multiply
    20,350.76x = 28,084.11 × 11,398.40
  4. Step 4: Simplify right side
    20,350.76x = 320,113,919.42
  5. Step 5: Solve for x
    x = 320,113,919.42/20,350.76
  6. Step 6: Final answer
    x = 15,729.83

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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.