Home / 31,399.20-47,105.28-13,637.52

Finding the Fourth Proportional to 31,399.20, 47,105.28 and 13,637.52

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Solution

The fourth proportional to 31,399.20, 47,105.28 and 13,637.52 is: 20,459.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,399.20 : 47,105.28 = 13,637.52 : x
  2. Step 2: Convert to fraction form
    31,399.20/47,105.28 = 13,637.52/x
  3. Step 3: Cross multiply
    31,399.20x = 47,105.28 × 13,637.52
  4. Step 4: Simplify right side
    31,399.20x = 642,399,198.11
  5. Step 5: Solve for x
    x = 642,399,198.11/31,399.20
  6. Step 6: Final answer
    x = 20,459.09

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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.