Home / 6,715.20-10,072.80-3,943.20

Finding the Fourth Proportional to 6,715.20, 10,072.80 and 3,943.20

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Solution

The fourth proportional to 6,715.20, 10,072.80 and 3,943.20 is: 5,914.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,715.20 : 10,072.80 = 3,943.20 : x
  2. Step 2: Convert to fraction form
    6,715.20/10,072.80 = 3,943.20/x
  3. Step 3: Cross multiply
    6,715.20x = 10,072.80 × 3,943.20
  4. Step 4: Simplify right side
    6,715.20x = 39,719,064.96
  5. Step 5: Solve for x
    x = 39,719,064.96/6,715.20
  6. Step 6: Final answer
    x = 5,914.80

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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.