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Finding the Fourth Proportional to 5,789.36, 7,981.80 and 3,689.84

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Solution

The fourth proportional to 5,789.36, 7,981.80 and 3,689.84 is: 5,087.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,789.36 : 7,981.80 = 3,689.84 : x
  2. Step 2: Convert to fraction form
    5,789.36/7,981.80 = 3,689.84/x
  3. Step 3: Cross multiply
    5,789.36x = 7,981.80 × 3,689.84
  4. Step 4: Simplify right side
    5,789.36x = 29,451,564.91
  5. Step 5: Solve for x
    x = 29,451,564.91/5,789.36
  6. Step 6: Final answer
    x = 5,087.19

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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.