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Finding the Fourth Proportional to 18,912.78, 26,092.04 and 11,359.52

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Solution

The fourth proportional to 18,912.78, 26,092.04 and 11,359.52 is: 15,671.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,912.78 : 26,092.04 = 11,359.52 : x
  2. Step 2: Convert to fraction form
    18,912.78/26,092.04 = 11,359.52/x
  3. Step 3: Cross multiply
    18,912.78x = 26,092.04 × 11,359.52
  4. Step 4: Simplify right side
    18,912.78x = 296,393,050.22
  5. Step 5: Solve for x
    x = 296,393,050.22/18,912.78
  6. Step 6: Final answer
    x = 15,671.57

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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.