Home / 11,987.28-17,983.80-5,745.51

Finding the Fourth Proportional to 11,987.28, 17,983.80 and 5,745.51

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Solution

The fourth proportional to 11,987.28, 17,983.80 and 5,745.51 is: 8,619.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,987.28 : 17,983.80 = 5,745.51 : x
  2. Step 2: Convert to fraction form
    11,987.28/17,983.80 = 5,745.51/x
  3. Step 3: Cross multiply
    11,987.28x = 17,983.80 × 5,745.51
  4. Step 4: Simplify right side
    11,987.28x = 103,326,102.74
  5. Step 5: Solve for x
    x = 103,326,102.74/11,987.28
  6. Step 6: Final answer
    x = 8,619.65

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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.