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Finding the Fourth Proportional to 18,866, 28,311.96 and 6,554

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Solution

The fourth proportional to 18,866, 28,311.96 and 6,554 is: 9,835.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,866 : 28,311.96 = 6,554 : x
  2. Step 2: Convert to fraction form
    18,866/28,311.96 = 6,554/x
  3. Step 3: Cross multiply
    18,866x = 28,311.96 × 6,554
  4. Step 4: Simplify right side
    18,866x = 185,556,585.84
  5. Step 5: Solve for x
    x = 185,556,585.84/18,866
  6. Step 6: Final answer
    x = 9,835.50

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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.