Home / 8,660.40-11,947.14-5,517.60

Finding the Fourth Proportional to 8,660.40, 11,947.14 and 5,517.60

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Solution

The fourth proportional to 8,660.40, 11,947.14 and 5,517.60 is: 7,611.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,660.40 : 11,947.14 = 5,517.60 : x
  2. Step 2: Convert to fraction form
    8,660.40/11,947.14 = 5,517.60/x
  3. Step 3: Cross multiply
    8,660.40x = 11,947.14 × 5,517.60
  4. Step 4: Simplify right side
    8,660.40x = 65,919,539.66
  5. Step 5: Solve for x
    x = 65,919,539.66/8,660.40
  6. Step 6: Final answer
    x = 7,611.60

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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.