Home / 20,865.12-31,304.97-9,179.25

Finding the Fourth Proportional to 20,865.12, 31,304.97 and 9,179.25

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Solution

The fourth proportional to 20,865.12, 31,304.97 and 9,179.25 is: 13,772.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,865.12 : 31,304.97 = 9,179.25 : x
  2. Step 2: Convert to fraction form
    20,865.12/31,304.97 = 9,179.25/x
  3. Step 3: Cross multiply
    20,865.12x = 31,304.97 × 9,179.25
  4. Step 4: Simplify right side
    20,865.12x = 287,356,145.87
  5. Step 5: Solve for x
    x = 287,356,145.87/20,865.12
  6. Step 6: Final answer
    x = 13,772.08

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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.