Home / 7,856.28-11,783.66-2,661.88

Finding the Fourth Proportional to 7,856.28, 11,783.66 and 2,661.88

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Solution

The fourth proportional to 7,856.28, 11,783.66 and 2,661.88 is: 3,992.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,856.28 : 11,783.66 = 2,661.88 : x
  2. Step 2: Convert to fraction form
    7,856.28/11,783.66 = 2,661.88/x
  3. Step 3: Cross multiply
    7,856.28x = 11,783.66 × 2,661.88
  4. Step 4: Simplify right side
    7,856.28x = 31,366,688.88
  5. Step 5: Solve for x
    x = 31,366,688.88/7,856.28
  6. Step 6: Final answer
    x = 3,992.56

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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.