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Finding the Fourth Proportional to 8,805.67, 13,208.39 and 2,142.20

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Solution

The fourth proportional to 8,805.67, 13,208.39 and 2,142.20 is: 3,213.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,805.67 : 13,208.39 = 2,142.20 : x
  2. Step 2: Convert to fraction form
    8,805.67/13,208.39 = 2,142.20/x
  3. Step 3: Cross multiply
    8,805.67x = 13,208.39 × 2,142.20
  4. Step 4: Simplify right side
    8,805.67x = 28,295,051.43
  5. Step 5: Solve for x
    x = 28,295,051.43/8,805.67
  6. Step 6: Final answer
    x = 3,213.28

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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.