Home / 28,266.45-39,008.15-15,691.20

Finding the Fourth Proportional to 28,266.45, 39,008.15 and 15,691.20

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Solution

The fourth proportional to 28,266.45, 39,008.15 and 15,691.20 is: 21,654.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,266.45 : 39,008.15 = 15,691.20 : x
  2. Step 2: Convert to fraction form
    28,266.45/39,008.15 = 15,691.20/x
  3. Step 3: Cross multiply
    28,266.45x = 39,008.15 × 15,691.20
  4. Step 4: Simplify right side
    28,266.45x = 612,084,683.28
  5. Step 5: Solve for x
    x = 612,084,683.28/28,266.45
  6. Step 6: Final answer
    x = 21,654.11

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1.5x scale

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.