Home / 5,138.91-7,091.01-2,900.61

Finding the Fourth Proportional to 5,138.91, 7,091.01 and 2,900.61

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Solution

The fourth proportional to 5,138.91, 7,091.01 and 2,900.61 is: 4,002.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,138.91 : 7,091.01 = 2,900.61 : x
  2. Step 2: Convert to fraction form
    5,138.91/7,091.01 = 2,900.61/x
  3. Step 3: Cross multiply
    5,138.91x = 7,091.01 × 2,900.61
  4. Step 4: Simplify right side
    5,138.91x = 20,568,254.52
  5. Step 5: Solve for x
    x = 20,568,254.52/5,138.91
  6. Step 6: Final answer
    x = 4,002.45

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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.