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Finding the Fourth Proportional to 18,791.13, 28,148.41 and 8,900.43

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Solution

The fourth proportional to 18,791.13, 28,148.41 and 8,900.43 is: 13,332.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,791.13 : 28,148.41 = 8,900.43 : x
  2. Step 2: Convert to fraction form
    18,791.13/28,148.41 = 8,900.43/x
  3. Step 3: Cross multiply
    18,791.13x = 28,148.41 × 8,900.43
  4. Step 4: Simplify right side
    18,791.13x = 250,532,767.57
  5. Step 5: Solve for x
    x = 250,532,767.57/18,791.13
  6. Step 6: Final answer
    x = 13,332.50

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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.