Home / 3,987.81-5,502.56-2,309.36

Finding the Fourth Proportional to 3,987.81, 5,502.56 and 2,309.36

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Solution

The fourth proportional to 3,987.81, 5,502.56 and 2,309.36 is: 3,186.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,987.81 : 5,502.56 = 2,309.36 : x
  2. Step 2: Convert to fraction form
    3,987.81/5,502.56 = 2,309.36/x
  3. Step 3: Cross multiply
    3,987.81x = 5,502.56 × 2,309.36
  4. Step 4: Simplify right side
    3,987.81x = 12,707,352.90
  5. Step 5: Solve for x
    x = 12,707,352.90/3,987.81
  6. Step 6: Final answer
    x = 3,186.55

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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.