Home / 10,715.20-16,072.80-2,817.70

Finding the Fourth Proportional to 10,715.20, 16,072.80 and 2,817.70

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Solution

The fourth proportional to 10,715.20, 16,072.80 and 2,817.70 is: 4,226.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,715.20 : 16,072.80 = 2,817.70 : x
  2. Step 2: Convert to fraction form
    10,715.20/16,072.80 = 2,817.70/x
  3. Step 3: Cross multiply
    10,715.20x = 16,072.80 × 2,817.70
  4. Step 4: Simplify right side
    10,715.20x = 45,288,328.56
  5. Step 5: Solve for x
    x = 45,288,328.56/10,715.20
  6. Step 6: Final answer
    x = 4,226.55

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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.