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Finding the Fourth Proportional to 15,940.82, 21,998.04 and 8,867.18

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Solution

The fourth proportional to 15,940.82, 21,998.04 and 8,867.18 is: 12,236.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,940.82 : 21,998.04 = 8,867.18 : x
  2. Step 2: Convert to fraction form
    15,940.82/21,998.04 = 8,867.18/x
  3. Step 3: Cross multiply
    15,940.82x = 21,998.04 × 8,867.18
  4. Step 4: Simplify right side
    15,940.82x = 195,060,580.33
  5. Step 5: Solve for x
    x = 195,060,580.33/15,940.82
  6. Step 6: Final answer
    x = 12,236.55

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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.