Home / 10,320.20-15,480.30-4,159.88

Finding the Fourth Proportional to 10,320.20, 15,480.30 and 4,159.88

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Solution

The fourth proportional to 10,320.20, 15,480.30 and 4,159.88 is: 6,239.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,320.20 : 15,480.30 = 4,159.88 : x
  2. Step 2: Convert to fraction form
    10,320.20/15,480.30 = 4,159.88/x
  3. Step 3: Cross multiply
    10,320.20x = 15,480.30 × 4,159.88
  4. Step 4: Simplify right side
    10,320.20x = 64,396,190.36
  5. Step 5: Solve for x
    x = 64,396,190.36/10,320.20
  6. Step 6: Final answer
    x = 6,239.82

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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.