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Finding the Fourth Proportional to 18,859.84, 28,294.57 and 8,862.65

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Solution

The fourth proportional to 18,859.84, 28,294.57 and 8,862.65 is: 13,296.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,859.84 : 28,294.57 = 8,862.65 : x
  2. Step 2: Convert to fraction form
    18,859.84/28,294.57 = 8,862.65/x
  3. Step 3: Cross multiply
    18,859.84x = 28,294.57 × 8,862.65
  4. Step 4: Simplify right side
    18,859.84x = 250,764,765.03
  5. Step 5: Solve for x
    x = 250,764,765.03/18,859.84
  6. Step 6: Final answer
    x = 13,296.23

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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.