Home / 15,278.47-21,083.92-8,472.46

Finding the Fourth Proportional to 15,278.47, 21,083.92 and 8,472.46

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Solution

The fourth proportional to 15,278.47, 21,083.92 and 8,472.46 is: 11,691.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,278.47 : 21,083.92 = 8,472.46 : x
  2. Step 2: Convert to fraction form
    15,278.47/21,083.92 = 8,472.46/x
  3. Step 3: Cross multiply
    15,278.47x = 21,083.92 × 8,472.46
  4. Step 4: Simplify right side
    15,278.47x = 178,632,687.96
  5. Step 5: Solve for x
    x = 178,632,687.96/15,278.47
  6. Step 6: Final answer
    x = 11,691.79

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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.