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Finding the Fourth Proportional to 8,805.78, 13,116.92 and 8,338.30

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Solution

The fourth proportional to 8,805.78, 13,116.92 and 8,338.30 is: 12,420.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,805.78 : 13,116.92 = 8,338.30 : x
  2. Step 2: Convert to fraction form
    8,805.78/13,116.92 = 8,338.30/x
  3. Step 3: Cross multiply
    8,805.78x = 13,116.92 × 8,338.30
  4. Step 4: Simplify right side
    8,805.78x = 109,372,814.04
  5. Step 5: Solve for x
    x = 109,372,814.04/8,805.78
  6. Step 6: Final answer
    x = 12,420.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.