Home / 8,538.36-12,813.29-2,991.75

Finding the Fourth Proportional to 8,538.36, 12,813.29 and 2,991.75

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Solution

The fourth proportional to 8,538.36, 12,813.29 and 2,991.75 is: 4,489.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,538.36 : 12,813.29 = 2,991.75 : x
  2. Step 2: Convert to fraction form
    8,538.36/12,813.29 = 2,991.75/x
  3. Step 3: Cross multiply
    8,538.36x = 12,813.29 × 2,991.75
  4. Step 4: Simplify right side
    8,538.36x = 38,334,197.47
  5. Step 5: Solve for x
    x = 38,334,197.47/8,538.36
  6. Step 6: Final answer
    x = 4,489.64

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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.