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Finding the Fourth Proportional to 6,906.31, 9,530.38 and 3,921.74

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Solution

The fourth proportional to 6,906.31, 9,530.38 and 3,921.74 is: 5,411.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,906.31 : 9,530.38 = 3,921.74 : x
  2. Step 2: Convert to fraction form
    6,906.31/9,530.38 = 3,921.74/x
  3. Step 3: Cross multiply
    6,906.31x = 9,530.38 × 3,921.74
  4. Step 4: Simplify right side
    6,906.31x = 37,375,703.28
  5. Step 5: Solve for x
    x = 37,375,703.28/6,906.31
  6. Step 6: Final answer
    x = 5,411.82

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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.