Home / 28,142.64-42,228-11,514.96

Finding the Fourth Proportional to 28,142.64, 42,228 and 11,514.96

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Solution

The fourth proportional to 28,142.64, 42,228 and 11,514.96 is: 17,278.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,142.64 : 42,228 = 11,514.96 : x
  2. Step 2: Convert to fraction form
    28,142.64/42,228 = 11,514.96/x
  3. Step 3: Cross multiply
    28,142.64x = 42,228 × 11,514.96
  4. Step 4: Simplify right side
    28,142.64x = 486,253,730.88
  5. Step 5: Solve for x
    x = 486,253,730.88/28,142.64
  6. Step 6: Final answer
    x = 17,278.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.