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Finding the Fourth Proportional to 6,991.89, 9,640.94 and 5,100.14

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Solution

The fourth proportional to 6,991.89, 9,640.94 and 5,100.14 is: 7,032.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,991.89 : 9,640.94 = 5,100.14 : x
  2. Step 2: Convert to fraction form
    6,991.89/9,640.94 = 5,100.14/x
  3. Step 3: Cross multiply
    6,991.89x = 9,640.94 × 5,100.14
  4. Step 4: Simplify right side
    6,991.89x = 49,170,070.03
  5. Step 5: Solve for x
    x = 49,170,070.03/6,991.89
  6. Step 6: Final answer
    x = 7,032.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.