Home / 13,423.11-18,517.82-8,641.34

Finding the Fourth Proportional to 13,423.11, 18,517.82 and 8,641.34

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Solution

The fourth proportional to 13,423.11, 18,517.82 and 8,641.34 is: 11,921.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,423.11 : 18,517.82 = 8,641.34 : x
  2. Step 2: Convert to fraction form
    13,423.11/18,517.82 = 8,641.34/x
  3. Step 3: Cross multiply
    13,423.11x = 18,517.82 × 8,641.34
  4. Step 4: Simplify right side
    13,423.11x = 160,018,778.68
  5. Step 5: Solve for x
    x = 160,018,778.68/13,423.11
  6. Step 6: Final answer
    x = 11,921.14

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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.