Home / 13,591.68-20,390.40-4,231.48

Finding the Fourth Proportional to 13,591.68, 20,390.40 and 4,231.48

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Solution

The fourth proportional to 13,591.68, 20,390.40 and 4,231.48 is: 6,348.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,591.68 : 20,390.40 = 4,231.48 : x
  2. Step 2: Convert to fraction form
    13,591.68/20,390.40 = 4,231.48/x
  3. Step 3: Cross multiply
    13,591.68x = 20,390.40 × 4,231.48
  4. Step 4: Simplify right side
    13,591.68x = 86,281,569.79
  5. Step 5: Solve for x
    x = 86,281,569.79/13,591.68
  6. Step 6: Final answer
    x = 6,348.12

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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.