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Finding the Fourth Proportional to 8,412.39, 11,601.23 and 6,648.21

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Solution

The fourth proportional to 8,412.39, 11,601.23 and 6,648.21 is: 9,168.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,412.39 : 11,601.23 = 6,648.21 : x
  2. Step 2: Convert to fraction form
    8,412.39/11,601.23 = 6,648.21/x
  3. Step 3: Cross multiply
    8,412.39x = 11,601.23 × 6,648.21
  4. Step 4: Simplify right side
    8,412.39x = 77,127,380.06
  5. Step 5: Solve for x
    x = 77,127,380.06/8,412.39
  6. Step 6: Final answer
    x = 9,168.31

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.