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Finding the Fourth Proportional to 6,687.09, 9,986.73 and 5,372.84

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Solution

The fourth proportional to 6,687.09, 9,986.73 and 5,372.84 is: 8,023.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,687.09 : 9,986.73 = 5,372.84 : x
  2. Step 2: Convert to fraction form
    6,687.09/9,986.73 = 5,372.84/x
  3. Step 3: Cross multiply
    6,687.09x = 9,986.73 × 5,372.84
  4. Step 4: Simplify right side
    6,687.09x = 53,657,143.94
  5. Step 5: Solve for x
    x = 53,657,143.94/6,687.09
  6. Step 6: Final answer
    x = 8,023.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.