Home / 18,789.89-28,185.17-6,781.55

Finding the Fourth Proportional to 18,789.89, 28,185.17 and 6,781.55

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Solution

The fourth proportional to 18,789.89, 28,185.17 and 6,781.55 is: 10,172.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,789.89 : 28,185.17 = 6,781.55 : x
  2. Step 2: Convert to fraction form
    18,789.89/28,185.17 = 6,781.55/x
  3. Step 3: Cross multiply
    18,789.89x = 28,185.17 × 6,781.55
  4. Step 4: Simplify right side
    18,789.89x = 191,138,964.78
  5. Step 5: Solve for x
    x = 191,138,964.78/18,789.89
  6. Step 6: Final answer
    x = 10,172.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.