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Finding the Fourth Proportional to 18,301.25, 25,255.73 and 9,917.75

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Solution

The fourth proportional to 18,301.25, 25,255.73 and 9,917.75 is: 13,686.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,301.25 : 25,255.73 = 9,917.75 : x
  2. Step 2: Convert to fraction form
    18,301.25/25,255.73 = 9,917.75/x
  3. Step 3: Cross multiply
    18,301.25x = 25,255.73 × 9,917.75
  4. Step 4: Simplify right side
    18,301.25x = 250,479,966.62
  5. Step 5: Solve for x
    x = 250,479,966.62/18,301.25
  6. Step 6: Final answer
    x = 13,686.50

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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.