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Finding the Fourth Proportional to 10,813.77, 16,220.79 and 3,418.88

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Solution

The fourth proportional to 10,813.77, 16,220.79 and 3,418.88 is: 5,128.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,813.77 : 16,220.79 = 3,418.88 : x
  2. Step 2: Convert to fraction form
    10,813.77/16,220.79 = 3,418.88/x
  3. Step 3: Cross multiply
    10,813.77x = 16,220.79 × 3,418.88
  4. Step 4: Simplify right side
    10,813.77x = 55,456,853.41
  5. Step 5: Solve for x
    x = 55,456,853.41/10,813.77
  6. Step 6: Final answer
    x = 5,128.36

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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.