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Finding the Fourth Proportional to 6,986.99, 9,642.44 and 4,003.32

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Solution

The fourth proportional to 6,986.99, 9,642.44 and 4,003.32 is: 5,524.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,986.99 : 9,642.44 = 4,003.32 : x
  2. Step 2: Convert to fraction form
    6,986.99/9,642.44 = 4,003.32/x
  3. Step 3: Cross multiply
    6,986.99x = 9,642.44 × 4,003.32
  4. Step 4: Simplify right side
    6,986.99x = 38,601,819.07
  5. Step 5: Solve for x
    x = 38,601,819.07/6,986.99
  6. Step 6: Final answer
    x = 5,524.81

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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.