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Finding the Fourth Proportional to 18,842.84, 25,972.77 and 12,791.24

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Solution

The fourth proportional to 18,842.84, 25,972.77 and 12,791.24 is: 17,631.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,842.84 : 25,972.77 = 12,791.24 : x
  2. Step 2: Convert to fraction form
    18,842.84/25,972.77 = 12,791.24/x
  3. Step 3: Cross multiply
    18,842.84x = 25,972.77 × 12,791.24
  4. Step 4: Simplify right side
    18,842.84x = 332,223,934.53
  5. Step 5: Solve for x
    x = 332,223,934.53/18,842.84
  6. Step 6: Final answer
    x = 17,631.31

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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.