Home / 5,000.78-7,499.60-2,078.38

Finding the Fourth Proportional to 5,000.78, 7,499.60 and 2,078.38

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Solution

The fourth proportional to 5,000.78, 7,499.60 and 2,078.38 is: 3,116.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,000.78 : 7,499.60 = 2,078.38 : x
  2. Step 2: Convert to fraction form
    5,000.78/7,499.60 = 2,078.38/x
  3. Step 3: Cross multiply
    5,000.78x = 7,499.60 × 2,078.38
  4. Step 4: Simplify right side
    5,000.78x = 15,587,018.65
  5. Step 5: Solve for x
    x = 15,587,018.65/5,000.78
  6. Step 6: Final answer
    x = 3,116.92

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1.5x scale

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.