Home / 15,122.43-20,870.10-8,408.61

Finding the Fourth Proportional to 15,122.43, 20,870.10 and 8,408.61

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Solution

The fourth proportional to 15,122.43, 20,870.10 and 8,408.61 is: 11,604.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,122.43 : 20,870.10 = 8,408.61 : x
  2. Step 2: Convert to fraction form
    15,122.43/20,870.10 = 8,408.61/x
  3. Step 3: Cross multiply
    15,122.43x = 20,870.10 × 8,408.61
  4. Step 4: Simplify right side
    15,122.43x = 175,488,531.56
  5. Step 5: Solve for x
    x = 175,488,531.56/15,122.43
  6. Step 6: Final answer
    x = 11,604.52

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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.