Home / 7,856.15-11,781.13-2,857.33

Finding the Fourth Proportional to 7,856.15, 11,781.13 and 2,857.33

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Solution

The fourth proportional to 7,856.15, 11,781.13 and 2,857.33 is: 4,284.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,856.15 : 11,781.13 = 2,857.33 : x
  2. Step 2: Convert to fraction form
    7,856.15/11,781.13 = 2,857.33/x
  3. Step 3: Cross multiply
    7,856.15x = 11,781.13 × 2,857.33
  4. Step 4: Simplify right side
    7,856.15x = 33,662,589.12
  5. Step 5: Solve for x
    x = 33,662,589.12/7,856.15
  6. Step 6: Final answer
    x = 4,284.87

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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.