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Finding the Fourth Proportional to 18,697.31, 25,791.44 and 12,324.91

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Solution

The fourth proportional to 18,697.31, 25,791.44 and 12,324.91 is: 17,001.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,697.31 : 25,791.44 = 12,324.91 : x
  2. Step 2: Convert to fraction form
    18,697.31/25,791.44 = 12,324.91/x
  3. Step 3: Cross multiply
    18,697.31x = 25,791.44 × 12,324.91
  4. Step 4: Simplify right side
    18,697.31x = 317,877,081.48
  5. Step 5: Solve for x
    x = 317,877,081.48/18,697.31
  6. Step 6: Final answer
    x = 17,001.22

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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.