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Finding the Fourth Proportional to 26,459.88, 39,689.81 and 7,991.88

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Solution

The fourth proportional to 26,459.88, 39,689.81 and 7,991.88 is: 11,987.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,459.88 : 39,689.81 = 7,991.88 : x
  2. Step 2: Convert to fraction form
    26,459.88/39,689.81 = 7,991.88/x
  3. Step 3: Cross multiply
    26,459.88x = 39,689.81 × 7,991.88
  4. Step 4: Simplify right side
    26,459.88x = 317,196,198.74
  5. Step 5: Solve for x
    x = 317,196,198.74/26,459.88
  6. Step 6: Final answer
    x = 11,987.82

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.