Home / 13,689.62-18,874.55-11,424.21

Finding the Fourth Proportional to 13,689.62, 18,874.55 and 11,424.21

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Solution

The fourth proportional to 13,689.62, 18,874.55 and 11,424.21 is: 15,751.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,689.62 : 18,874.55 = 11,424.21 : x
  2. Step 2: Convert to fraction form
    13,689.62/18,874.55 = 11,424.21/x
  3. Step 3: Cross multiply
    13,689.62x = 18,874.55 × 11,424.21
  4. Step 4: Simplify right side
    13,689.62x = 215,626,765.73
  5. Step 5: Solve for x
    x = 215,626,765.73/13,689.62
  6. Step 6: Final answer
    x = 15,751.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.