Home / 3,931.74-5,431.05-2,889.27

Finding the Fourth Proportional to 3,931.74, 5,431.05 and 2,889.27

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Solution

The fourth proportional to 3,931.74, 5,431.05 and 2,889.27 is: 3,991.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,931.74 : 5,431.05 = 2,889.27 : x
  2. Step 2: Convert to fraction form
    3,931.74/5,431.05 = 2,889.27/x
  3. Step 3: Cross multiply
    3,931.74x = 5,431.05 × 2,889.27
  4. Step 4: Simplify right side
    3,931.74x = 15,691,769.83
  5. Step 5: Solve for x
    x = 15,691,769.83/3,931.74
  6. Step 6: Final answer
    x = 3,991.05

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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.