Home / 5,243.81-7,863.40-2,778.06

Finding the Fourth Proportional to 5,243.81, 7,863.40 and 2,778.06

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Solution

The fourth proportional to 5,243.81, 7,863.40 and 2,778.06 is: 4,165.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,243.81 : 7,863.40 = 2,778.06 : x
  2. Step 2: Convert to fraction form
    5,243.81/7,863.40 = 2,778.06/x
  3. Step 3: Cross multiply
    5,243.81x = 7,863.40 × 2,778.06
  4. Step 4: Simplify right side
    5,243.81x = 21,845,004.60
  5. Step 5: Solve for x
    x = 21,845,004.60/5,243.81
  6. Step 6: Final answer
    x = 4,165.87

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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.