Home / 18,721.86-25,805.35-13,272.73

Finding the Fourth Proportional to 18,721.86, 25,805.35 and 13,272.73

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Solution

The fourth proportional to 18,721.86, 25,805.35 and 13,272.73 is: 18,294.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,721.86 : 25,805.35 = 13,272.73 : x
  2. Step 2: Convert to fraction form
    18,721.86/25,805.35 = 13,272.73/x
  3. Step 3: Cross multiply
    18,721.86x = 25,805.35 × 13,272.73
  4. Step 4: Simplify right side
    18,721.86x = 342,507,311.97
  5. Step 5: Solve for x
    x = 342,507,311.97/18,721.86
  6. Step 6: Final answer
    x = 18,294.51

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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.