Home / 20,622.90-28,387.36-17,965.70

Finding the Fourth Proportional to 20,622.90, 28,387.36 and 17,965.70

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Solution

The fourth proportional to 20,622.90, 28,387.36 and 17,965.70 is: 24,729.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,622.90 : 28,387.36 = 17,965.70 : x
  2. Step 2: Convert to fraction form
    20,622.90/28,387.36 = 17,965.70/x
  3. Step 3: Cross multiply
    20,622.90x = 28,387.36 × 17,965.70
  4. Step 4: Simplify right side
    20,622.90x = 509,998,780.52
  5. Step 5: Solve for x
    x = 509,998,780.52/20,622.90
  6. Step 6: Final answer
    x = 24,729.73

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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.