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Finding the Fourth Proportional to 13,752.87, 20,630.12 and 3,891.33

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Solution

The fourth proportional to 13,752.87, 20,630.12 and 3,891.33 is: 5,837.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,752.87 : 20,630.12 = 3,891.33 : x
  2. Step 2: Convert to fraction form
    13,752.87/20,630.12 = 3,891.33/x
  3. Step 3: Cross multiply
    13,752.87x = 20,630.12 × 3,891.33
  4. Step 4: Simplify right side
    13,752.87x = 80,278,585.40
  5. Step 5: Solve for x
    x = 80,278,585.40/13,752.87
  6. Step 6: Final answer
    x = 5,837.22

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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.