Home / 20,512.38-28,308.42-15,467.70

Finding the Fourth Proportional to 20,512.38, 28,308.42 and 15,467.70

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Solution

The fourth proportional to 20,512.38, 28,308.42 and 15,467.70 is: 21,346.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,512.38 : 28,308.42 = 15,467.70 : x
  2. Step 2: Convert to fraction form
    20,512.38/28,308.42 = 15,467.70/x
  3. Step 3: Cross multiply
    20,512.38x = 28,308.42 × 15,467.70
  4. Step 4: Simplify right side
    20,512.38x = 437,866,148.03
  5. Step 5: Solve for x
    x = 437,866,148.03/20,512.38
  6. Step 6: Final answer
    x = 21,346.43

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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.