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Finding the Fourth Proportional to 6,609.80, 9,912.30 and 2,659.40

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Solution

The fourth proportional to 6,609.80, 9,912.30 and 2,659.40 is: 3,988.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,609.80 : 9,912.30 = 2,659.40 : x
  2. Step 2: Convert to fraction form
    6,609.80/9,912.30 = 2,659.40/x
  3. Step 3: Cross multiply
    6,609.80x = 9,912.30 × 2,659.40
  4. Step 4: Simplify right side
    6,609.80x = 26,360,770.62
  5. Step 5: Solve for x
    x = 26,360,770.62/6,609.80
  6. Step 6: Final answer
    x = 3,988.13

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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.