Home / 45,065.76-67,610.16-20,436

Finding the Fourth Proportional to 45,065.76, 67,610.16 and 20,436

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Solution

The fourth proportional to 45,065.76, 67,610.16 and 20,436 is: 30,659.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,065.76 : 67,610.16 = 20,436 : x
  2. Step 2: Convert to fraction form
    45,065.76/67,610.16 = 20,436/x
  3. Step 3: Cross multiply
    45,065.76x = 67,610.16 × 20,436
  4. Step 4: Simplify right side
    45,065.76x = 1,381,681,229.76
  5. Step 5: Solve for x
    x = 1,381,681,229.76/45,065.76
  6. Step 6: Final answer
    x = 30,659.22

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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.