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Finding the Fourth Proportional to 8,322.78, 11,486.94 and 4,965.78

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Solution

The fourth proportional to 8,322.78, 11,486.94 and 4,965.78 is: 6,853.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,322.78 : 11,486.94 = 4,965.78 : x
  2. Step 2: Convert to fraction form
    8,322.78/11,486.94 = 4,965.78/x
  3. Step 3: Cross multiply
    8,322.78x = 11,486.94 × 4,965.78
  4. Step 4: Simplify right side
    8,322.78x = 57,041,616.91
  5. Step 5: Solve for x
    x = 57,041,616.91/8,322.78
  6. Step 6: Final answer
    x = 6,853.67

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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.