Home / 7,134.08-9,845.12-3,990.29

Finding the Fourth Proportional to 7,134.08, 9,845.12 and 3,990.29

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Solution

The fourth proportional to 7,134.08, 9,845.12 and 3,990.29 is: 5,506.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,134.08 : 9,845.12 = 3,990.29 : x
  2. Step 2: Convert to fraction form
    7,134.08/9,845.12 = 3,990.29/x
  3. Step 3: Cross multiply
    7,134.08x = 9,845.12 × 3,990.29
  4. Step 4: Simplify right side
    7,134.08x = 39,284,863.93
  5. Step 5: Solve for x
    x = 39,284,863.93/7,134.08
  6. Step 6: Final answer
    x = 5,506.65

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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.