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Finding the Fourth Proportional to 3,891.12, 5,826.48 and 3,107.52

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Solution

The fourth proportional to 3,891.12, 5,826.48 and 3,107.52 is: 4,653.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,891.12 : 5,826.48 = 3,107.52 : x
  2. Step 2: Convert to fraction form
    3,891.12/5,826.48 = 3,107.52/x
  3. Step 3: Cross multiply
    3,891.12x = 5,826.48 × 3,107.52
  4. Step 4: Simplify right side
    3,891.12x = 18,105,903.13
  5. Step 5: Solve for x
    x = 18,105,903.13/3,891.12
  6. Step 6: Final answer
    x = 4,653.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.