Home / 13,621.20-20,429.80-4,259.04

Finding the Fourth Proportional to 13,621.20, 20,429.80 and 4,259.04

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Solution

The fourth proportional to 13,621.20, 20,429.80 and 4,259.04 is: 6,387.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,621.20 : 20,429.80 = 4,259.04 : x
  2. Step 2: Convert to fraction form
    13,621.20/20,429.80 = 4,259.04/x
  3. Step 3: Cross multiply
    13,621.20x = 20,429.80 × 4,259.04
  4. Step 4: Simplify right side
    13,621.20x = 87,011,335.39
  5. Step 5: Solve for x
    x = 87,011,335.39/13,621.20
  6. Step 6: Final answer
    x = 6,387.93

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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.