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Finding the Fourth Proportional to 6,658.96, 9,988.41 and 1,728.19

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Solution

The fourth proportional to 6,658.96, 9,988.41 and 1,728.19 is: 2,592.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,658.96 : 9,988.41 = 1,728.19 : x
  2. Step 2: Convert to fraction form
    6,658.96/9,988.41 = 1,728.19/x
  3. Step 3: Cross multiply
    6,658.96x = 9,988.41 × 1,728.19
  4. Step 4: Simplify right side
    6,658.96x = 17,261,870.28
  5. Step 5: Solve for x
    x = 17,261,870.28/6,658.96
  6. Step 6: Final answer
    x = 2,592.28

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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.