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Finding the Fourth Proportional to 12,691.74, 17,513.96 and 6,949.04

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Solution

The fourth proportional to 12,691.74, 17,513.96 and 6,949.04 is: 9,589.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,691.74 : 17,513.96 = 6,949.04 : x
  2. Step 2: Convert to fraction form
    12,691.74/17,513.96 = 6,949.04/x
  3. Step 3: Cross multiply
    12,691.74x = 17,513.96 × 6,949.04
  4. Step 4: Simplify right side
    12,691.74x = 121,705,208.60
  5. Step 5: Solve for x
    x = 121,705,208.60/12,691.74
  6. Step 6: Final answer
    x = 9,589.32

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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.