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Finding the Fourth Proportional to 6,659.30, 9,988.90 and 2,217.30

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Solution

The fourth proportional to 6,659.30, 9,988.90 and 2,217.30 is: 3,325.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,659.30 : 9,988.90 = 2,217.30 : x
  2. Step 2: Convert to fraction form
    6,659.30/9,988.90 = 2,217.30/x
  3. Step 3: Cross multiply
    6,659.30x = 9,988.90 × 2,217.30
  4. Step 4: Simplify right side
    6,659.30x = 22,148,357.44
  5. Step 5: Solve for x
    x = 22,148,357.44/6,659.30
  6. Step 6: Final answer
    x = 3,325.93

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Double scale
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Similar ratio
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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.