Home / 20,351.05-28,084.12-11,398.52

Finding the Fourth Proportional to 20,351.05, 28,084.12 and 11,398.52

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Solution

The fourth proportional to 20,351.05, 28,084.12 and 11,398.52 is: 15,729.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,351.05 : 28,084.12 = 11,398.52 : x
  2. Step 2: Convert to fraction form
    20,351.05/28,084.12 = 11,398.52/x
  3. Step 3: Cross multiply
    20,351.05x = 28,084.12 × 11,398.52
  4. Step 4: Simplify right side
    20,351.05x = 320,117,445.22
  5. Step 5: Solve for x
    x = 320,117,445.22/20,351.05
  6. Step 6: Final answer
    x = 15,729.78

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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.