Home / 20,438.60-28,204.06-11,487.04

Finding the Fourth Proportional to 20,438.60, 28,204.06 and 11,487.04

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Solution

The fourth proportional to 20,438.60, 28,204.06 and 11,487.04 is: 15,851.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,438.60 : 28,204.06 = 11,487.04 : x
  2. Step 2: Convert to fraction form
    20,438.60/28,204.06 = 11,487.04/x
  3. Step 3: Cross multiply
    20,438.60x = 28,204.06 × 11,487.04
  4. Step 4: Simplify right side
    20,438.60x = 323,981,165.38
  5. Step 5: Solve for x
    x = 323,981,165.38/20,438.60
  6. Step 6: Final answer
    x = 15,851.44

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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.