Home / 5,138.88-7,091.78-2,900.96

Finding the Fourth Proportional to 5,138.88, 7,091.78 and 2,900.96

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Solution

The fourth proportional to 5,138.88, 7,091.78 and 2,900.96 is: 4,003.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,138.88 : 7,091.78 = 2,900.96 : x
  2. Step 2: Convert to fraction form
    5,138.88/7,091.78 = 2,900.96/x
  3. Step 3: Cross multiply
    5,138.88x = 7,091.78 × 2,900.96
  4. Step 4: Simplify right side
    5,138.88x = 20,572,963.06
  5. Step 5: Solve for x
    x = 20,572,963.06/5,138.88
  6. Step 6: Final answer
    x = 4,003.40

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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.