Home / 31,417.18-47,129.20-13,635.61

Finding the Fourth Proportional to 31,417.18, 47,129.20 and 13,635.61

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Solution

The fourth proportional to 31,417.18, 47,129.20 and 13,635.61 is: 20,454.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,417.18 : 47,129.20 = 13,635.61 : x
  2. Step 2: Convert to fraction form
    31,417.18/47,129.20 = 13,635.61/x
  3. Step 3: Cross multiply
    31,417.18x = 47,129.20 × 13,635.61
  4. Step 4: Simplify right side
    31,417.18x = 642,635,322.63
  5. Step 5: Solve for x
    x = 642,635,322.63/31,417.18
  6. Step 6: Final answer
    x = 20,454.90

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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.