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Finding the Fourth Proportional to 10,860, 16,290 and 3,934.50

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Solution

The fourth proportional to 10,860, 16,290 and 3,934.50 is: 5,901.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,860 : 16,290 = 3,934.50 : x
  2. Step 2: Convert to fraction form
    10,860/16,290 = 3,934.50/x
  3. Step 3: Cross multiply
    10,860x = 16,290 × 3,934.50
  4. Step 4: Simplify right side
    10,860x = 64,093,005
  5. Step 5: Solve for x
    x = 64,093,005/10,860
  6. Step 6: Final answer
    x = 5,901.75

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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.