Home / 21,375.39-29,508.42-15,015.50

Finding the Fourth Proportional to 21,375.39, 29,508.42 and 15,015.50

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Solution

The fourth proportional to 21,375.39, 29,508.42 and 15,015.50 is: 20,728.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,375.39 : 29,508.42 = 15,015.50 : x
  2. Step 2: Convert to fraction form
    21,375.39/29,508.42 = 15,015.50/x
  3. Step 3: Cross multiply
    21,375.39x = 29,508.42 × 15,015.50
  4. Step 4: Simplify right side
    21,375.39x = 443,083,532.97
  5. Step 5: Solve for x
    x = 443,083,532.97/21,375.39
  6. Step 6: Final answer
    x = 20,728.68

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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.