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Finding the Fourth Proportional to 10,891.34, 16,338 and 3,870.68

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Solution

The fourth proportional to 10,891.34, 16,338 and 3,870.68 is: 5,806.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,891.34 : 16,338 = 3,870.68 : x
  2. Step 2: Convert to fraction form
    10,891.34/16,338 = 3,870.68/x
  3. Step 3: Cross multiply
    10,891.34x = 16,338 × 3,870.68
  4. Step 4: Simplify right side
    10,891.34x = 63,239,169.84
  5. Step 5: Solve for x
    x = 63,239,169.84/10,891.34
  6. Step 6: Final answer
    x = 5,806.37

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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.