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Finding the Fourth Proportional to 6,991.88, 10,487.91 and 2,776.17

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Solution

The fourth proportional to 6,991.88, 10,487.91 and 2,776.17 is: 4,164.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,991.88 : 10,487.91 = 2,776.17 : x
  2. Step 2: Convert to fraction form
    6,991.88/10,487.91 = 2,776.17/x
  3. Step 3: Cross multiply
    6,991.88x = 10,487.91 × 2,776.17
  4. Step 4: Simplify right side
    6,991.88x = 29,116,221.10
  5. Step 5: Solve for x
    x = 29,116,221.10/6,991.88
  6. Step 6: Final answer
    x = 4,164.29

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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.