Home / 31,920.74-47,884.34-12,215.87

Finding the Fourth Proportional to 31,920.74, 47,884.34 and 12,215.87

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Solution

The fourth proportional to 31,920.74, 47,884.34 and 12,215.87 is: 18,325.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,920.74 : 47,884.34 = 12,215.87 : x
  2. Step 2: Convert to fraction form
    31,920.74/47,884.34 = 12,215.87/x
  3. Step 3: Cross multiply
    31,920.74x = 47,884.34 × 12,215.87
  4. Step 4: Simplify right side
    31,920.74x = 584,948,663.59
  5. Step 5: Solve for x
    x = 584,948,663.59/31,920.74
  6. Step 6: Final answer
    x = 18,325.04

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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.