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Finding the Fourth Proportional to 18,757.80, 28,098.90 and 11,716.20

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Solution

The fourth proportional to 18,757.80, 28,098.90 and 11,716.20 is: 17,550.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,757.80 : 28,098.90 = 11,716.20 : x
  2. Step 2: Convert to fraction form
    18,757.80/28,098.90 = 11,716.20/x
  3. Step 3: Cross multiply
    18,757.80x = 28,098.90 × 11,716.20
  4. Step 4: Simplify right side
    18,757.80x = 329,212,332.18
  5. Step 5: Solve for x
    x = 329,212,332.18/18,757.80
  6. Step 6: Final answer
    x = 17,550.69

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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.