Home / 13,902.04-20,864-5,139.44

Finding the Fourth Proportional to 13,902.04, 20,864 and 5,139.44

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Solution

The fourth proportional to 13,902.04, 20,864 and 5,139.44 is: 7,713.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,902.04 : 20,864 = 5,139.44 : x
  2. Step 2: Convert to fraction form
    13,902.04/20,864 = 5,139.44/x
  3. Step 3: Cross multiply
    13,902.04x = 20,864 × 5,139.44
  4. Step 4: Simplify right side
    13,902.04x = 107,229,276.16
  5. Step 5: Solve for x
    x = 107,229,276.16/13,902.04
  6. Step 6: Final answer
    x = 7,713.20

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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.