Home / 31,425.12-47,139.84-9,239.04

Finding the Fourth Proportional to 31,425.12, 47,139.84 and 9,239.04

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Solution

The fourth proportional to 31,425.12, 47,139.84 and 9,239.04 is: 13,859.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,425.12 : 47,139.84 = 9,239.04 : x
  2. Step 2: Convert to fraction form
    31,425.12/47,139.84 = 9,239.04/x
  3. Step 3: Cross multiply
    31,425.12x = 47,139.84 × 9,239.04
  4. Step 4: Simplify right side
    31,425.12x = 435,526,867.35
  5. Step 5: Solve for x
    x = 435,526,867.35/31,425.12
  6. Step 6: Final answer
    x = 13,859.20

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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.