Home / 8,121.21-11,196.30-6,699.66

Finding the Fourth Proportional to 8,121.21, 11,196.30 and 6,699.66

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Solution

The fourth proportional to 8,121.21, 11,196.30 and 6,699.66 is: 9,236.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,121.21 : 11,196.30 = 6,699.66 : x
  2. Step 2: Convert to fraction form
    8,121.21/11,196.30 = 6,699.66/x
  3. Step 3: Cross multiply
    8,121.21x = 11,196.30 × 6,699.66
  4. Step 4: Simplify right side
    8,121.21x = 75,011,430.53
  5. Step 5: Solve for x
    x = 75,011,430.53/8,121.21
  6. Step 6: Final answer
    x = 9,236.48

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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.