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Finding the Fourth Proportional to 40,340, 60,512.16 and 12,640.16

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Solution

The fourth proportional to 40,340, 60,512.16 and 12,640.16 is: 18,960.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,340 : 60,512.16 = 12,640.16 : x
  2. Step 2: Convert to fraction form
    40,340/60,512.16 = 12,640.16/x
  3. Step 3: Cross multiply
    40,340x = 60,512.16 × 12,640.16
  4. Step 4: Simplify right side
    40,340x = 764,883,384.35
  5. Step 5: Solve for x
    x = 764,883,384.35/40,340
  6. Step 6: Final answer
    x = 18,960.92

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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.