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Finding the Fourth Proportional to 18,774.25, 25,914.24 and 10,821.79

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Solution

The fourth proportional to 18,774.25, 25,914.24 and 10,821.79 is: 14,937.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,774.25 : 25,914.24 = 10,821.79 : x
  2. Step 2: Convert to fraction form
    18,774.25/25,914.24 = 10,821.79/x
  3. Step 3: Cross multiply
    18,774.25x = 25,914.24 × 10,821.79
  4. Step 4: Simplify right side
    18,774.25x = 280,438,463.29
  5. Step 5: Solve for x
    x = 280,438,463.29/18,774.25
  6. Step 6: Final answer
    x = 14,937.40

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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.