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Finding the Fourth Proportional to 40,312, 60,470.16 and 12,612.16

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Solution

The fourth proportional to 40,312, 60,470.16 and 12,612.16 is: 18,918.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,312 : 60,470.16 = 12,612.16 : x
  2. Step 2: Convert to fraction form
    40,312/60,470.16 = 12,612.16/x
  3. Step 3: Cross multiply
    40,312x = 60,470.16 × 12,612.16
  4. Step 4: Simplify right side
    40,312x = 762,659,333.15
  5. Step 5: Solve for x
    x = 762,659,333.15/40,312
  6. Step 6: Final answer
    x = 18,918.92

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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.