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Finding the Fourth Proportional to 6,689.66, 9,231.56 and 3,664.76

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Solution

The fourth proportional to 6,689.66, 9,231.56 and 3,664.76 is: 5,057.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,689.66 : 9,231.56 = 3,664.76 : x
  2. Step 2: Convert to fraction form
    6,689.66/9,231.56 = 3,664.76/x
  3. Step 3: Cross multiply
    6,689.66x = 9,231.56 × 3,664.76
  4. Step 4: Simplify right side
    6,689.66x = 33,831,451.83
  5. Step 5: Solve for x
    x = 33,831,451.83/6,689.66
  6. Step 6: Final answer
    x = 5,057.28

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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.