Home / 15,418.43-21,278.43-8,701.61

Finding the Fourth Proportional to 15,418.43, 21,278.43 and 8,701.61

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Solution

The fourth proportional to 15,418.43, 21,278.43 and 8,701.61 is: 12,008.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,418.43 : 21,278.43 = 8,701.61 : x
  2. Step 2: Convert to fraction form
    15,418.43/21,278.43 = 8,701.61/x
  3. Step 3: Cross multiply
    15,418.43x = 21,278.43 × 8,701.61
  4. Step 4: Simplify right side
    15,418.43x = 185,156,492.88
  5. Step 5: Solve for x
    x = 185,156,492.88/15,418.43
  6. Step 6: Final answer
    x = 12,008.78

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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.