Home / 13,820.76-20,731.86-3,959.10

Finding the Fourth Proportional to 13,820.76, 20,731.86 and 3,959.10

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Solution

The fourth proportional to 13,820.76, 20,731.86 and 3,959.10 is: 5,938.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,820.76 : 20,731.86 = 3,959.10 : x
  2. Step 2: Convert to fraction form
    13,820.76/20,731.86 = 3,959.10/x
  3. Step 3: Cross multiply
    13,820.76x = 20,731.86 × 3,959.10
  4. Step 4: Simplify right side
    13,820.76x = 82,079,506.93
  5. Step 5: Solve for x
    x = 82,079,506.93/13,820.76
  6. Step 6: Final answer
    x = 5,938.86

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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.