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Finding the Fourth Proportional to 7,894.80, 11,856.24 and 6,816.96

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Solution

The fourth proportional to 7,894.80, 11,856.24 and 6,816.96 is: 10,237.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,894.80 : 11,856.24 = 6,816.96 : x
  2. Step 2: Convert to fraction form
    7,894.80/11,856.24 = 6,816.96/x
  3. Step 3: Cross multiply
    7,894.80x = 11,856.24 × 6,816.96
  4. Step 4: Simplify right side
    7,894.80x = 80,823,513.83
  5. Step 5: Solve for x
    x = 80,823,513.83/7,894.80
  6. Step 6: Final answer
    x = 10,237.56

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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.