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Finding the Fourth Proportional to 3,689.52, 5,086.64 and 3,057.68

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Solution

The fourth proportional to 3,689.52, 5,086.64 and 3,057.68 is: 4,215.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,689.52 : 5,086.64 = 3,057.68 : x
  2. Step 2: Convert to fraction form
    3,689.52/5,086.64 = 3,057.68/x
  3. Step 3: Cross multiply
    3,689.52x = 5,086.64 × 3,057.68
  4. Step 4: Simplify right side
    3,689.52x = 15,553,317.40
  5. Step 5: Solve for x
    x = 15,553,317.40/3,689.52
  6. Step 6: Final answer
    x = 4,215.54

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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.