Home / 18,691.32-25,805.58-15,295.80

Finding the Fourth Proportional to 18,691.32, 25,805.58 and 15,295.80

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Solution

The fourth proportional to 18,691.32, 25,805.58 and 15,295.80 is: 21,117.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,691.32 : 25,805.58 = 15,295.80 : x
  2. Step 2: Convert to fraction form
    18,691.32/25,805.58 = 15,295.80/x
  3. Step 3: Cross multiply
    18,691.32x = 25,805.58 × 15,295.80
  4. Step 4: Simplify right side
    18,691.32x = 394,716,990.56
  5. Step 5: Solve for x
    x = 394,716,990.56/18,691.32
  6. Step 6: Final answer
    x = 21,117.66

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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.