Home / 20,631.78-28,470.96-11,200.14

Finding the Fourth Proportional to 20,631.78, 28,470.96 and 11,200.14

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Solution

The fourth proportional to 20,631.78, 28,470.96 and 11,200.14 is: 15,455.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,631.78 : 28,470.96 = 11,200.14 : x
  2. Step 2: Convert to fraction form
    20,631.78/28,470.96 = 11,200.14/x
  3. Step 3: Cross multiply
    20,631.78x = 28,470.96 × 11,200.14
  4. Step 4: Simplify right side
    20,631.78x = 318,878,737.93
  5. Step 5: Solve for x
    x = 318,878,737.93/20,631.78
  6. Step 6: Final answer
    x = 15,455.71

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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.