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Finding the Fourth Proportional to 12,104.28, 16,696.80 and 8,321.04

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Solution

The fourth proportional to 12,104.28, 16,696.80 and 8,321.04 is: 11,478.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,104.28 : 16,696.80 = 8,321.04 : x
  2. Step 2: Convert to fraction form
    12,104.28/16,696.80 = 8,321.04/x
  3. Step 3: Cross multiply
    12,104.28x = 16,696.80 × 8,321.04
  4. Step 4: Simplify right side
    12,104.28x = 138,934,740.67
  5. Step 5: Solve for x
    x = 138,934,740.67/12,104.28
  6. Step 6: Final answer
    x = 11,478.15

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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.