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Finding the Fourth Proportional to 15,165, 20,927.70 and 8,877.38

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Solution

The fourth proportional to 15,165, 20,927.70 and 8,877.38 is: 12,250.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,165 : 20,927.70 = 8,877.38 : x
  2. Step 2: Convert to fraction form
    15,165/20,927.70 = 8,877.38/x
  3. Step 3: Cross multiply
    15,165x = 20,927.70 × 8,877.38
  4. Step 4: Simplify right side
    15,165x = 185,783,040.79
  5. Step 5: Solve for x
    x = 185,783,040.79/15,165
  6. Step 6: Final answer
    x = 12,250.78

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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.