Home / 10,078.80-15,115.78-3,153.30

Finding the Fourth Proportional to 10,078.80, 15,115.78 and 3,153.30

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Solution

The fourth proportional to 10,078.80, 15,115.78 and 3,153.30 is: 4,729.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,078.80 : 15,115.78 = 3,153.30 : x
  2. Step 2: Convert to fraction form
    10,078.80/15,115.78 = 3,153.30/x
  3. Step 3: Cross multiply
    10,078.80x = 15,115.78 × 3,153.30
  4. Step 4: Simplify right side
    10,078.80x = 47,664,589.07
  5. Step 5: Solve for x
    x = 47,664,589.07/10,078.80
  6. Step 6: Final answer
    x = 4,729.19

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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.