Home / 11,391.55-15,720.29-6,355.78

Finding the Fourth Proportional to 11,391.55, 15,720.29 and 6,355.78

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Solution

The fourth proportional to 11,391.55, 15,720.29 and 6,355.78 is: 8,770.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,391.55 : 15,720.29 = 6,355.78 : x
  2. Step 2: Convert to fraction form
    11,391.55/15,720.29 = 6,355.78/x
  3. Step 3: Cross multiply
    11,391.55x = 15,720.29 × 6,355.78
  4. Step 4: Simplify right side
    11,391.55x = 99,914,704.78
  5. Step 5: Solve for x
    x = 99,914,704.78/11,391.55
  6. Step 6: Final answer
    x = 8,770.95

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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.