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Finding the Fourth Proportional to 12,609.79, 17,398.87 and 7,304.29

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Solution

The fourth proportional to 12,609.79, 17,398.87 and 7,304.29 is: 10,078.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,609.79 : 17,398.87 = 7,304.29 : x
  2. Step 2: Convert to fraction form
    12,609.79/17,398.87 = 7,304.29/x
  3. Step 3: Cross multiply
    12,609.79x = 17,398.87 × 7,304.29
  4. Step 4: Simplify right side
    12,609.79x = 127,086,392.15
  5. Step 5: Solve for x
    x = 127,086,392.15/12,609.79
  6. Step 6: Final answer
    x = 10,078.39

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Half scale
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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.