Home / 12,138.67-18,207.33-5,115.70

Finding the Fourth Proportional to 12,138.67, 18,207.33 and 5,115.70

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Solution

The fourth proportional to 12,138.67, 18,207.33 and 5,115.70 is: 7,673.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,138.67 : 18,207.33 = 5,115.70 : x
  2. Step 2: Convert to fraction form
    12,138.67/18,207.33 = 5,115.70/x
  3. Step 3: Cross multiply
    12,138.67x = 18,207.33 × 5,115.70
  4. Step 4: Simplify right side
    12,138.67x = 93,143,238.08
  5. Step 5: Solve for x
    x = 93,143,238.08/12,138.67
  6. Step 6: Final answer
    x = 7,673.27

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1.5x scale

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.