Home / 8,121.16-11,196.38-6,448.11

Finding the Fourth Proportional to 8,121.16, 11,196.38 and 6,448.11

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Solution

The fourth proportional to 8,121.16, 11,196.38 and 6,448.11 is: 8,889.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,121.16 : 11,196.38 = 6,448.11 : x
  2. Step 2: Convert to fraction form
    8,121.16/11,196.38 = 6,448.11/x
  3. Step 3: Cross multiply
    8,121.16x = 11,196.38 × 6,448.11
  4. Step 4: Simplify right side
    8,121.16x = 72,195,427.71
  5. Step 5: Solve for x
    x = 72,195,427.71/8,121.16
  6. Step 6: Final answer
    x = 8,889.79

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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.