Home / 5,135.91-7,087.60-2,778.10

Finding the Fourth Proportional to 5,135.91, 7,087.60 and 2,778.10

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Solution

The fourth proportional to 5,135.91, 7,087.60 and 2,778.10 is: 3,833.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,135.91 : 7,087.60 = 2,778.10 : x
  2. Step 2: Convert to fraction form
    5,135.91/7,087.60 = 2,778.10/x
  3. Step 3: Cross multiply
    5,135.91x = 7,087.60 × 2,778.10
  4. Step 4: Simplify right side
    5,135.91x = 19,690,047.31
  5. Step 5: Solve for x
    x = 19,690,047.31/5,135.91
  6. Step 6: Final answer
    x = 3,833.80

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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.