Home / 13,517.28-18,650.66-8,211.78

Finding the Fourth Proportional to 13,517.28, 18,650.66 and 8,211.78

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Solution

The fourth proportional to 13,517.28, 18,650.66 and 8,211.78 is: 11,330.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,517.28 : 18,650.66 = 8,211.78 : x
  2. Step 2: Convert to fraction form
    13,517.28/18,650.66 = 8,211.78/x
  3. Step 3: Cross multiply
    13,517.28x = 18,650.66 × 8,211.78
  4. Step 4: Simplify right side
    13,517.28x = 153,155,075.72
  5. Step 5: Solve for x
    x = 153,155,075.72/13,517.28
  6. Step 6: Final answer
    x = 11,330.32

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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.