Home / 45,120.38-67,680.56-12,288.38

Finding the Fourth Proportional to 45,120.38, 67,680.56 and 12,288.38

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Solution

The fourth proportional to 45,120.38, 67,680.56 and 12,288.38 is: 18,432.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,120.38 : 67,680.56 = 12,288.38 : x
  2. Step 2: Convert to fraction form
    45,120.38/67,680.56 = 12,288.38/x
  3. Step 3: Cross multiply
    45,120.38x = 67,680.56 × 12,288.38
  4. Step 4: Simplify right side
    45,120.38x = 831,684,132.21
  5. Step 5: Solve for x
    x = 831,684,132.21/45,120.38
  6. Step 6: Final answer
    x = 18,432.56

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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.