Home / 15,505.80-21,398.27-8,432.43

Finding the Fourth Proportional to 15,505.80, 21,398.27 and 8,432.43

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Solution

The fourth proportional to 15,505.80, 21,398.27 and 8,432.43 is: 11,636.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,505.80 : 21,398.27 = 8,432.43 : x
  2. Step 2: Convert to fraction form
    15,505.80/21,398.27 = 8,432.43/x
  3. Step 3: Cross multiply
    15,505.80x = 21,398.27 × 8,432.43
  4. Step 4: Simplify right side
    15,505.80x = 180,439,371.73
  5. Step 5: Solve for x
    x = 180,439,371.73/15,505.80
  6. Step 6: Final answer
    x = 11,636.90

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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.