Home / 28,319.25-39,080.70-15,744

Finding the Fourth Proportional to 28,319.25, 39,080.70 and 15,744

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Solution

The fourth proportional to 28,319.25, 39,080.70 and 15,744 is: 21,726.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,319.25 : 39,080.70 = 15,744 : x
  2. Step 2: Convert to fraction form
    28,319.25/39,080.70 = 15,744/x
  3. Step 3: Cross multiply
    28,319.25x = 39,080.70 × 15,744
  4. Step 4: Simplify right side
    28,319.25x = 615,286,540.80
  5. Step 5: Solve for x
    x = 615,286,540.80/28,319.25
  6. Step 6: Final answer
    x = 21,726.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.