Home / 11,278.39-15,553.90-9,684.55

Finding the Fourth Proportional to 11,278.39, 15,553.90 and 9,684.55

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Solution

The fourth proportional to 11,278.39, 15,553.90 and 9,684.55 is: 13,355.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,278.39 : 15,553.90 = 9,684.55 : x
  2. Step 2: Convert to fraction form
    11,278.39/15,553.90 = 9,684.55/x
  3. Step 3: Cross multiply
    11,278.39x = 15,553.90 × 9,684.55
  4. Step 4: Simplify right side
    11,278.39x = 150,632,522.25
  5. Step 5: Solve for x
    x = 150,632,522.25/11,278.39
  6. Step 6: Final answer
    x = 13,355.85

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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.