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Finding the Fourth Proportional to 6,442.40, 9,663.60 and 5,648.80

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Solution

The fourth proportional to 6,442.40, 9,663.60 and 5,648.80 is: 8,473.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,442.40 : 9,663.60 = 5,648.80 : x
  2. Step 2: Convert to fraction form
    6,442.40/9,663.60 = 5,648.80/x
  3. Step 3: Cross multiply
    6,442.40x = 9,663.60 × 5,648.80
  4. Step 4: Simplify right side
    6,442.40x = 54,587,743.68
  5. Step 5: Solve for x
    x = 54,587,743.68/6,442.40
  6. Step 6: Final answer
    x = 8,473.20

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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.