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Finding the Fourth Proportional to 18,791.52, 25,873.20 and 15,266.40

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Solution

The fourth proportional to 18,791.52, 25,873.20 and 15,266.40 is: 21,019.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,791.52 : 25,873.20 = 15,266.40 : x
  2. Step 2: Convert to fraction form
    18,791.52/25,873.20 = 15,266.40/x
  3. Step 3: Cross multiply
    18,791.52x = 25,873.20 × 15,266.40
  4. Step 4: Simplify right side
    18,791.52x = 394,990,620.48
  5. Step 5: Solve for x
    x = 394,990,620.48/18,791.52
  6. Step 6: Final answer
    x = 21,019.62

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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.