Home / 5,135.90-7,087.55-2,778.04

Finding the Fourth Proportional to 5,135.90, 7,087.55 and 2,778.04

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Solution

The fourth proportional to 5,135.90, 7,087.55 and 2,778.04 is: 3,833.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,135.90 : 7,087.55 = 2,778.04 : x
  2. Step 2: Convert to fraction form
    5,135.90/7,087.55 = 2,778.04/x
  3. Step 3: Cross multiply
    5,135.90x = 7,087.55 × 2,778.04
  4. Step 4: Simplify right side
    5,135.90x = 19,689,492.37
  5. Step 5: Solve for x
    x = 19,689,492.37/5,135.90
  6. Step 6: Final answer
    x = 3,833.70

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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.