Home / 13,818.32-20,729-3,959.20

Finding the Fourth Proportional to 13,818.32, 20,729 and 3,959.20

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Solution

The fourth proportional to 13,818.32, 20,729 and 3,959.20 is: 5,939.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,818.32 : 20,729 = 3,959.20 : x
  2. Step 2: Convert to fraction form
    13,818.32/20,729 = 3,959.20/x
  3. Step 3: Cross multiply
    13,818.32x = 20,729 × 3,959.20
  4. Step 4: Simplify right side
    13,818.32x = 82,070,256.80
  5. Step 5: Solve for x
    x = 82,070,256.80/13,818.32
  6. Step 6: Final answer
    x = 5,939.24

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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.