Home / 31,987.20-47,995.20-15,340.80

Finding the Fourth Proportional to 31,987.20, 47,995.20 and 15,340.80

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Solution

The fourth proportional to 31,987.20, 47,995.20 and 15,340.80 is: 23,018.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,987.20 : 47,995.20 = 15,340.80 : x
  2. Step 2: Convert to fraction form
    31,987.20/47,995.20 = 15,340.80/x
  3. Step 3: Cross multiply
    31,987.20x = 47,995.20 × 15,340.80
  4. Step 4: Simplify right side
    31,987.20x = 736,284,764.16
  5. Step 5: Solve for x
    x = 736,284,764.16/31,987.20
  6. Step 6: Final answer
    x = 23,018.11

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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.