Home / 10,982.20-16,478.70-5,137.78

Finding the Fourth Proportional to 10,982.20, 16,478.70 and 5,137.78

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Solution

The fourth proportional to 10,982.20, 16,478.70 and 5,137.78 is: 7,709.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,982.20 : 16,478.70 = 5,137.78 : x
  2. Step 2: Convert to fraction form
    10,982.20/16,478.70 = 5,137.78/x
  3. Step 3: Cross multiply
    10,982.20x = 16,478.70 × 5,137.78
  4. Step 4: Simplify right side
    10,982.20x = 84,663,935.29
  5. Step 5: Solve for x
    x = 84,663,935.29/10,982.20
  6. Step 6: Final answer
    x = 7,709.20

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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.