Home / 20,348.79-28,081.80-11,395.86

Finding the Fourth Proportional to 20,348.79, 28,081.80 and 11,395.86

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Solution

The fourth proportional to 20,348.79, 28,081.80 and 11,395.86 is: 15,726.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,348.79 : 28,081.80 = 11,395.86 : x
  2. Step 2: Convert to fraction form
    20,348.79/28,081.80 = 11,395.86/x
  3. Step 3: Cross multiply
    20,348.79x = 28,081.80 × 11,395.86
  4. Step 4: Simplify right side
    20,348.79x = 320,016,261.35
  5. Step 5: Solve for x
    x = 320,016,261.35/20,348.79
  6. Step 6: Final answer
    x = 15,726.55

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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.