Home / 21,778.97-30,023.17-15,394.30

Finding the Fourth Proportional to 21,778.97, 30,023.17 and 15,394.30

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Solution

The fourth proportional to 21,778.97, 30,023.17 and 15,394.30 is: 21,221.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,778.97 : 30,023.17 = 15,394.30 : x
  2. Step 2: Convert to fraction form
    21,778.97/30,023.17 = 15,394.30/x
  3. Step 3: Cross multiply
    21,778.97x = 30,023.17 × 15,394.30
  4. Step 4: Simplify right side
    21,778.97x = 462,185,572.39
  5. Step 5: Solve for x
    x = 462,185,572.39/21,778.97
  6. Step 6: Final answer
    x = 21,221.64

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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.