Home / 13,115.10-19,672.65-6,872.70

Finding the Fourth Proportional to 13,115.10, 19,672.65 and 6,872.70

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Solution

The fourth proportional to 13,115.10, 19,672.65 and 6,872.70 is: 10,309.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,115.10 : 19,672.65 = 6,872.70 : x
  2. Step 2: Convert to fraction form
    13,115.10/19,672.65 = 6,872.70/x
  3. Step 3: Cross multiply
    13,115.10x = 19,672.65 × 6,872.70
  4. Step 4: Simplify right side
    13,115.10x = 135,204,221.66
  5. Step 5: Solve for x
    x = 135,204,221.66/13,115.10
  6. Step 6: Final answer
    x = 10,309.05

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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.