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Finding the Fourth Proportional to 12,661.72, 17,463.20 and 11,812.87

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Solution

The fourth proportional to 12,661.72, 17,463.20 and 11,812.87 is: 16,292.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,661.72 : 17,463.20 = 11,812.87 : x
  2. Step 2: Convert to fraction form
    12,661.72/17,463.20 = 11,812.87/x
  3. Step 3: Cross multiply
    12,661.72x = 17,463.20 × 11,812.87
  4. Step 4: Simplify right side
    12,661.72x = 206,290,474.15
  5. Step 5: Solve for x
    x = 206,290,474.15/12,661.72
  6. Step 6: Final answer
    x = 16,292.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.