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Finding the Fourth Proportional to 6,689.79, 9,231.39 and 3,705.39

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Solution

The fourth proportional to 6,689.79, 9,231.39 and 3,705.39 is: 5,113.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,689.79 : 9,231.39 = 3,705.39 : x
  2. Step 2: Convert to fraction form
    6,689.79/9,231.39 = 3,705.39/x
  3. Step 3: Cross multiply
    6,689.79x = 9,231.39 × 3,705.39
  4. Step 4: Simplify right side
    6,689.79x = 34,205,900.19
  5. Step 5: Solve for x
    x = 34,205,900.19/6,689.79
  6. Step 6: Final answer
    x = 5,113.15

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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.