Home / 5,129.73-7,078.91-2,861.10

Finding the Fourth Proportional to 5,129.73, 7,078.91 and 2,861.10

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Solution

The fourth proportional to 5,129.73, 7,078.91 and 2,861.10 is: 3,948.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,129.73 : 7,078.91 = 2,861.10 : x
  2. Step 2: Convert to fraction form
    5,129.73/7,078.91 = 2,861.10/x
  3. Step 3: Cross multiply
    5,129.73x = 7,078.91 × 2,861.10
  4. Step 4: Simplify right side
    5,129.73x = 20,253,455.10
  5. Step 5: Solve for x
    x = 20,253,455.10/5,129.73
  6. Step 6: Final answer
    x = 3,948.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.