Home / 28,115.25-38,799.09-15,540

Finding the Fourth Proportional to 28,115.25, 38,799.09 and 15,540

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Solution

The fourth proportional to 28,115.25, 38,799.09 and 15,540 is: 21,445.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,115.25 : 38,799.09 = 15,540 : x
  2. Step 2: Convert to fraction form
    28,115.25/38,799.09 = 15,540/x
  3. Step 3: Cross multiply
    28,115.25x = 38,799.09 × 15,540
  4. Step 4: Simplify right side
    28,115.25x = 602,937,858.60
  5. Step 5: Solve for x
    x = 602,937,858.60/28,115.25
  6. Step 6: Final answer
    x = 21,445.22

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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.