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Finding the Fourth Proportional to 12,689.52, 17,512.11 and 7,100.52

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Solution

The fourth proportional to 12,689.52, 17,512.11 and 7,100.52 is: 9,799.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,689.52 : 17,512.11 = 7,100.52 : x
  2. Step 2: Convert to fraction form
    12,689.52/17,512.11 = 7,100.52/x
  3. Step 3: Cross multiply
    12,689.52x = 17,512.11 × 7,100.52
  4. Step 4: Simplify right side
    12,689.52x = 124,345,087.30
  5. Step 5: Solve for x
    x = 124,345,087.30/12,689.52
  6. Step 6: Final answer
    x = 9,799.04

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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.