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Finding the Fourth Proportional to 10,620, 15,932.02 and 5,073.78

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Solution

The fourth proportional to 10,620, 15,932.02 and 5,073.78 is: 7,611.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,620 : 15,932.02 = 5,073.78 : x
  2. Step 2: Convert to fraction form
    10,620/15,932.02 = 5,073.78/x
  3. Step 3: Cross multiply
    10,620x = 15,932.02 × 5,073.78
  4. Step 4: Simplify right side
    10,620x = 80,835,564.44
  5. Step 5: Solve for x
    x = 80,835,564.44/10,620
  6. Step 6: Final answer
    x = 7,611.64

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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.