Home / 21,517.22-29,696.55-12,085.79

Finding the Fourth Proportional to 21,517.22, 29,696.55 and 12,085.79

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Solution

The fourth proportional to 21,517.22, 29,696.55 and 12,085.79 is: 16,679.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,517.22 : 29,696.55 = 12,085.79 : x
  2. Step 2: Convert to fraction form
    21,517.22/29,696.55 = 12,085.79/x
  3. Step 3: Cross multiply
    21,517.22x = 29,696.55 × 12,085.79
  4. Step 4: Simplify right side
    21,517.22x = 358,906,118.54
  5. Step 5: Solve for x
    x = 358,906,118.54/21,517.22
  6. Step 6: Final answer
    x = 16,679.95

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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.