Home / 8,116.80-12,189.60-6,272.40

Finding the Fourth Proportional to 8,116.80, 12,189.60 and 6,272.40

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Solution

The fourth proportional to 8,116.80, 12,189.60 and 6,272.40 is: 9,419.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,116.80 : 12,189.60 = 6,272.40 : x
  2. Step 2: Convert to fraction form
    8,116.80/12,189.60 = 6,272.40/x
  3. Step 3: Cross multiply
    8,116.80x = 12,189.60 × 6,272.40
  4. Step 4: Simplify right side
    8,116.80x = 76,458,047.04
  5. Step 5: Solve for x
    x = 76,458,047.04/8,116.80
  6. Step 6: Final answer
    x = 9,419.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.