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Finding the Fourth Proportional to 6,659.30, 9,989.02 and 1,979.18

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Solution

The fourth proportional to 6,659.30, 9,989.02 and 1,979.18 is: 2,968.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,659.30 : 9,989.02 = 1,979.18 : x
  2. Step 2: Convert to fraction form
    6,659.30/9,989.02 = 1,979.18/x
  3. Step 3: Cross multiply
    6,659.30x = 9,989.02 × 1,979.18
  4. Step 4: Simplify right side
    6,659.30x = 19,770,114.78
  5. Step 5: Solve for x
    x = 19,770,114.78/6,659.30
  6. Step 6: Final answer
    x = 2,968.80

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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.