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Finding the Fourth Proportional to 12,689.77, 17,512.34 and 6,947.62

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Solution

The fourth proportional to 12,689.77, 17,512.34 and 6,947.62 is: 9,587.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,689.77 : 17,512.34 = 6,947.62 : x
  2. Step 2: Convert to fraction form
    12,689.77/17,512.34 = 6,947.62/x
  3. Step 3: Cross multiply
    12,689.77x = 17,512.34 × 6,947.62
  4. Step 4: Simplify right side
    12,689.77x = 121,669,144.78
  5. Step 5: Solve for x
    x = 121,669,144.78/12,689.77
  6. Step 6: Final answer
    x = 9,587.97

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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.