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Finding the Fourth Proportional to 18,642.39, 27,963.87 and 9,859.14

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Solution

The fourth proportional to 18,642.39, 27,963.87 and 9,859.14 is: 14,788.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,642.39 : 27,963.87 = 9,859.14 : x
  2. Step 2: Convert to fraction form
    18,642.39/27,963.87 = 9,859.14/x
  3. Step 3: Cross multiply
    18,642.39x = 27,963.87 × 9,859.14
  4. Step 4: Simplify right side
    18,642.39x = 275,699,709.27
  5. Step 5: Solve for x
    x = 275,699,709.27/18,642.39
  6. Step 6: Final answer
    x = 14,788.86

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1.5x scale

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.