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Finding the Fourth Proportional to 12,696.80, 17,517.34 and 7,390.49

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Solution

The fourth proportional to 12,696.80, 17,517.34 and 7,390.49 is: 10,196.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,696.80 : 17,517.34 = 7,390.49 : x
  2. Step 2: Convert to fraction form
    12,696.80/17,517.34 = 7,390.49/x
  3. Step 3: Cross multiply
    12,696.80x = 17,517.34 × 7,390.49
  4. Step 4: Simplify right side
    12,696.80x = 129,461,726.10
  5. Step 5: Solve for x
    x = 129,461,726.10/12,696.80
  6. Step 6: Final answer
    x = 10,196.41

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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.