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Finding the Fourth Proportional to 36,687.60, 55,010.74 and 11,721.80

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Solution

The fourth proportional to 36,687.60, 55,010.74 and 11,721.80 is: 17,576.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,687.60 : 55,010.74 = 11,721.80 : x
  2. Step 2: Convert to fraction form
    36,687.60/55,010.74 = 11,721.80/x
  3. Step 3: Cross multiply
    36,687.60x = 55,010.74 × 11,721.80
  4. Step 4: Simplify right side
    36,687.60x = 644,824,892.13
  5. Step 5: Solve for x
    x = 644,824,892.13/36,687.60
  6. Step 6: Final answer
    x = 17,576.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.