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Finding the Fourth Proportional to 12,487.28, 18,701.48 and 11,612.48

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Solution

The fourth proportional to 12,487.28, 18,701.48 and 11,612.48 is: 17,391.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,487.28 : 18,701.48 = 11,612.48 : x
  2. Step 2: Convert to fraction form
    12,487.28/18,701.48 = 11,612.48/x
  3. Step 3: Cross multiply
    12,487.28x = 18,701.48 × 11,612.48
  4. Step 4: Simplify right side
    12,487.28x = 217,170,562.47
  5. Step 5: Solve for x
    x = 217,170,562.47/12,487.28
  6. Step 6: Final answer
    x = 17,391.34

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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.