Home / 2,581.36-3,870.36-1,931.80

Finding the Fourth Proportional to 2,581.36, 3,870.36 and 1,931.80

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Solution

The fourth proportional to 2,581.36, 3,870.36 and 1,931.80 is: 2,896.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,581.36 : 3,870.36 = 1,931.80 : x
  2. Step 2: Convert to fraction form
    2,581.36/3,870.36 = 1,931.80/x
  3. Step 3: Cross multiply
    2,581.36x = 3,870.36 × 1,931.80
  4. Step 4: Simplify right side
    2,581.36x = 7,476,761.45
  5. Step 5: Solve for x
    x = 7,476,761.45/2,581.36
  6. Step 6: Final answer
    x = 2,896.44

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.