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Finding the Fourth Proportional to 18,951.65, 26,144.96 and 11,393.61

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Solution

The fourth proportional to 18,951.65, 26,144.96 and 11,393.61 is: 15,718.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,951.65 : 26,144.96 = 11,393.61 : x
  2. Step 2: Convert to fraction form
    18,951.65/26,144.96 = 11,393.61/x
  3. Step 3: Cross multiply
    18,951.65x = 26,144.96 × 11,393.61
  4. Step 4: Simplify right side
    18,951.65x = 297,885,420.74
  5. Step 5: Solve for x
    x = 297,885,420.74/18,951.65
  6. Step 6: Final answer
    x = 15,718.18

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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.