Home / 15,411.38-21,248.34-12,575.87

Finding the Fourth Proportional to 15,411.38, 21,248.34 and 12,575.87

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Solution

The fourth proportional to 15,411.38, 21,248.34 and 12,575.87 is: 17,338.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,411.38 : 21,248.34 = 12,575.87 : x
  2. Step 2: Convert to fraction form
    15,411.38/21,248.34 = 12,575.87/x
  3. Step 3: Cross multiply
    15,411.38x = 21,248.34 × 12,575.87
  4. Step 4: Simplify right side
    15,411.38x = 267,216,478.10
  5. Step 5: Solve for x
    x = 267,216,478.10/15,411.38
  6. Step 6: Final answer
    x = 17,338.91

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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.