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Finding the Fourth Proportional to 15,936.35, 21,990.03 and 8,861.41

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Solution

The fourth proportional to 15,936.35, 21,990.03 and 8,861.41 is: 12,227.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,936.35 : 21,990.03 = 8,861.41 : x
  2. Step 2: Convert to fraction form
    15,936.35/21,990.03 = 8,861.41/x
  3. Step 3: Cross multiply
    15,936.35x = 21,990.03 × 8,861.41
  4. Step 4: Simplify right side
    15,936.35x = 194,862,671.74
  5. Step 5: Solve for x
    x = 194,862,671.74/15,936.35
  6. Step 6: Final answer
    x = 12,227.56

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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.