Home / 5,138.74-7,091.83-2,900.81

Finding the Fourth Proportional to 5,138.74, 7,091.83 and 2,900.81

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Solution

The fourth proportional to 5,138.74, 7,091.83 and 2,900.81 is: 4,003.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,138.74 : 7,091.83 = 2,900.81 : x
  2. Step 2: Convert to fraction form
    5,138.74/7,091.83 = 2,900.81/x
  3. Step 3: Cross multiply
    5,138.74x = 7,091.83 × 2,900.81
  4. Step 4: Simplify right side
    5,138.74x = 20,572,015.92
  5. Step 5: Solve for x
    x = 20,572,015.92/5,138.74
  6. Step 6: Final answer
    x = 4,003.32

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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.