Home / 15,375.29-21,218.90-11,591.78

Finding the Fourth Proportional to 15,375.29, 21,218.90 and 11,591.78

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Solution

The fourth proportional to 15,375.29, 21,218.90 and 11,591.78 is: 15,997.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,375.29 : 21,218.90 = 11,591.78 : x
  2. Step 2: Convert to fraction form
    15,375.29/21,218.90 = 11,591.78/x
  3. Step 3: Cross multiply
    15,375.29x = 21,218.90 × 11,591.78
  4. Step 4: Simplify right side
    15,375.29x = 245,964,656.59
  5. Step 5: Solve for x
    x = 245,964,656.59/15,375.29
  6. Step 6: Final answer
    x = 15,997.40

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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.