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Finding the Fourth Proportional to 45,138.62, 67,718.86 and 13,548.62

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Solution

The fourth proportional to 45,138.62, 67,718.86 and 13,548.62 is: 20,326.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,138.62 : 67,718.86 = 13,548.62 : x
  2. Step 2: Convert to fraction form
    45,138.62/67,718.86 = 13,548.62/x
  3. Step 3: Cross multiply
    45,138.62x = 67,718.86 × 13,548.62
  4. Step 4: Simplify right side
    45,138.62x = 917,497,100.97
  5. Step 5: Solve for x
    x = 917,497,100.97/45,138.62
  6. Step 6: Final answer
    x = 20,326.21

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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.