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Finding the Fourth Proportional to 6,654.40, 9,981.60 and 6,179.20

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Solution

The fourth proportional to 6,654.40, 9,981.60 and 6,179.20 is: 9,268.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,654.40 : 9,981.60 = 6,179.20 : x
  2. Step 2: Convert to fraction form
    6,654.40/9,981.60 = 6,179.20/x
  3. Step 3: Cross multiply
    6,654.40x = 9,981.60 × 6,179.20
  4. Step 4: Simplify right side
    6,654.40x = 61,678,302.72
  5. Step 5: Solve for x
    x = 61,678,302.72/6,654.40
  6. Step 6: Final answer
    x = 9,268.80

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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.