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Finding the Fourth Proportional to 6,991.88, 10,487.81 and 2,611.40

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Solution

The fourth proportional to 6,991.88, 10,487.81 and 2,611.40 is: 3,917.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,991.88 : 10,487.81 = 2,611.40 : x
  2. Step 2: Convert to fraction form
    6,991.88/10,487.81 = 2,611.40/x
  3. Step 3: Cross multiply
    6,991.88x = 10,487.81 × 2,611.40
  4. Step 4: Simplify right side
    6,991.88x = 27,387,821.12
  5. Step 5: Solve for x
    x = 27,387,821.12/6,991.88
  6. Step 6: Final answer
    x = 3,917.09

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1.5x scale

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.