Home / 3,887.50-5,364.78-2,231.50

Finding the Fourth Proportional to 3,887.50, 5,364.78 and 2,231.50

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Solution

The fourth proportional to 3,887.50, 5,364.78 and 2,231.50 is: 3,079.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,887.50 : 5,364.78 = 2,231.50 : x
  2. Step 2: Convert to fraction form
    3,887.50/5,364.78 = 2,231.50/x
  3. Step 3: Cross multiply
    3,887.50x = 5,364.78 × 2,231.50
  4. Step 4: Simplify right side
    3,887.50x = 11,971,506.57
  5. Step 5: Solve for x
    x = 11,971,506.57/3,887.50
  6. Step 6: Final answer
    x = 3,079.49

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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.