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Finding the Fourth Proportional to 12,486.92, 17,232.28 and 6,821.90

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Solution

The fourth proportional to 12,486.92, 17,232.28 and 6,821.90 is: 9,414.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,486.92 : 17,232.28 = 6,821.90 : x
  2. Step 2: Convert to fraction form
    12,486.92/17,232.28 = 6,821.90/x
  3. Step 3: Cross multiply
    12,486.92x = 17,232.28 × 6,821.90
  4. Step 4: Simplify right side
    12,486.92x = 117,556,920.11
  5. Step 5: Solve for x
    x = 117,556,920.11/12,486.92
  6. Step 6: Final answer
    x = 9,414.41

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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.