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Finding the Fourth Proportional to 11,165.80, 16,767.90 and 7,901.80

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Solution

The fourth proportional to 11,165.80, 16,767.90 and 7,901.80 is: 11,866.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,165.80 : 16,767.90 = 7,901.80 : x
  2. Step 2: Convert to fraction form
    11,165.80/16,767.90 = 7,901.80/x
  3. Step 3: Cross multiply
    11,165.80x = 16,767.90 × 7,901.80
  4. Step 4: Simplify right side
    11,165.80x = 132,496,592.22
  5. Step 5: Solve for x
    x = 132,496,592.22/11,165.80
  6. Step 6: Final answer
    x = 11,866.29

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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.