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Finding the Fourth Proportional to 13,772.92, 20,661.82 and 5,987.20

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Solution

The fourth proportional to 13,772.92, 20,661.82 and 5,987.20 is: 8,981.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,772.92 : 20,661.82 = 5,987.20 : x
  2. Step 2: Convert to fraction form
    13,772.92/20,661.82 = 5,987.20/x
  3. Step 3: Cross multiply
    13,772.92x = 20,661.82 × 5,987.20
  4. Step 4: Simplify right side
    13,772.92x = 123,706,448.70
  5. Step 5: Solve for x
    x = 123,706,448.70/13,772.92
  6. Step 6: Final answer
    x = 8,981.86

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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.