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Finding the Fourth Proportional to 15,940.86, 21,998.37 and 8,867.13

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Solution

The fourth proportional to 15,940.86, 21,998.37 and 8,867.13 is: 12,236.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,940.86 : 21,998.37 = 8,867.13 : x
  2. Step 2: Convert to fraction form
    15,940.86/21,998.37 = 8,867.13/x
  3. Step 3: Cross multiply
    15,940.86x = 21,998.37 × 8,867.13
  4. Step 4: Simplify right side
    15,940.86x = 195,062,406.58
  5. Step 5: Solve for x
    x = 195,062,406.58/15,940.86
  6. Step 6: Final answer
    x = 12,236.63

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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.