Home / 5,140.78-7,715.49-4,816.78

Finding the Fourth Proportional to 5,140.78, 7,715.49 and 4,816.78

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Solution

The fourth proportional to 5,140.78, 7,715.49 and 4,816.78 is: 7,229.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,140.78 : 7,715.49 = 4,816.78 : x
  2. Step 2: Convert to fraction form
    5,140.78/7,715.49 = 4,816.78/x
  3. Step 3: Cross multiply
    5,140.78x = 7,715.49 × 4,816.78
  4. Step 4: Simplify right side
    5,140.78x = 37,163,780.57
  5. Step 5: Solve for x
    x = 37,163,780.57/5,140.78
  6. Step 6: Final answer
    x = 7,229.21

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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.