Home / 13,917.76-20,871.16-5,146.66

Finding the Fourth Proportional to 13,917.76, 20,871.16 and 5,146.66

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Solution

The fourth proportional to 13,917.76, 20,871.16 and 5,146.66 is: 7,717.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,917.76 : 20,871.16 = 5,146.66 : x
  2. Step 2: Convert to fraction form
    13,917.76/20,871.16 = 5,146.66/x
  3. Step 3: Cross multiply
    13,917.76x = 20,871.16 × 5,146.66
  4. Step 4: Simplify right side
    13,917.76x = 107,416,764.33
  5. Step 5: Solve for x
    x = 107,416,764.33/13,917.76
  6. Step 6: Final answer
    x = 7,717.96

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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.