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Finding the Fourth Proportional to 18,300.97, 25,255.35 and 9,917.47

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Solution

The fourth proportional to 18,300.97, 25,255.35 and 9,917.47 is: 13,686.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,300.97 : 25,255.35 = 9,917.47 : x
  2. Step 2: Convert to fraction form
    18,300.97/25,255.35 = 9,917.47/x
  3. Step 3: Cross multiply
    18,300.97x = 25,255.35 × 9,917.47
  4. Step 4: Simplify right side
    18,300.97x = 250,469,049.69
  5. Step 5: Solve for x
    x = 250,469,049.69/18,300.97
  6. Step 6: Final answer
    x = 13,686.11

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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.