Home / 13,440.92-20,158.30-5,121.88

Finding the Fourth Proportional to 13,440.92, 20,158.30 and 5,121.88

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Solution

The fourth proportional to 13,440.92, 20,158.30 and 5,121.88 is: 7,681.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,440.92 : 20,158.30 = 5,121.88 : x
  2. Step 2: Convert to fraction form
    13,440.92/20,158.30 = 5,121.88/x
  3. Step 3: Cross multiply
    13,440.92x = 20,158.30 × 5,121.88
  4. Step 4: Simplify right side
    13,440.92x = 103,248,393.60
  5. Step 5: Solve for x
    x = 103,248,393.60/13,440.92
  6. Step 6: Final answer
    x = 7,681.65

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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.