Home / 28,278.28-38,997.78-18,188.92

Finding the Fourth Proportional to 28,278.28, 38,997.78 and 18,188.92

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Solution

The fourth proportional to 28,278.28, 38,997.78 and 18,188.92 is: 25,083.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,278.28 : 38,997.78 = 18,188.92 : x
  2. Step 2: Convert to fraction form
    28,278.28/38,997.78 = 18,188.92/x
  3. Step 3: Cross multiply
    28,278.28x = 38,997.78 × 18,188.92
  4. Step 4: Simplify right side
    28,278.28x = 709,327,500.60
  5. Step 5: Solve for x
    x = 709,327,500.60/28,278.28
  6. Step 6: Final answer
    x = 25,083.83

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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.