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Finding the Fourth Proportional to 18,661.97, 25,751.04 and 11,495.90

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Solution

The fourth proportional to 18,661.97, 25,751.04 and 11,495.90 is: 15,862.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,661.97 : 25,751.04 = 11,495.90 : x
  2. Step 2: Convert to fraction form
    18,661.97/25,751.04 = 11,495.90/x
  3. Step 3: Cross multiply
    18,661.97x = 25,751.04 × 11,495.90
  4. Step 4: Simplify right side
    18,661.97x = 296,031,380.74
  5. Step 5: Solve for x
    x = 296,031,380.74/18,661.97
  6. Step 6: Final answer
    x = 15,862.82

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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.