Home / 15,761.20-21,750.60-8,687.44

Finding the Fourth Proportional to 15,761.20, 21,750.60 and 8,687.44

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Solution

The fourth proportional to 15,761.20, 21,750.60 and 8,687.44 is: 11,988.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,761.20 : 21,750.60 = 8,687.44 : x
  2. Step 2: Convert to fraction form
    15,761.20/21,750.60 = 8,687.44/x
  3. Step 3: Cross multiply
    15,761.20x = 21,750.60 × 8,687.44
  4. Step 4: Simplify right side
    15,761.20x = 188,957,032.46
  5. Step 5: Solve for x
    x = 188,957,032.46/15,761.20
  6. Step 6: Final answer
    x = 11,988.75

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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.