Home / 13,921.72-20,878.47-4,057.90

Finding the Fourth Proportional to 13,921.72, 20,878.47 and 4,057.90

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Solution

The fourth proportional to 13,921.72, 20,878.47 and 4,057.90 is: 6,085.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,921.72 : 20,878.47 = 4,057.90 : x
  2. Step 2: Convert to fraction form
    13,921.72/20,878.47 = 4,057.90/x
  3. Step 3: Cross multiply
    13,921.72x = 20,878.47 × 4,057.90
  4. Step 4: Simplify right side
    13,921.72x = 84,722,691.22
  5. Step 5: Solve for x
    x = 84,722,691.22/13,921.72
  6. Step 6: Final answer
    x = 6,085.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.