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Finding the Fourth Proportional to 8,669, 13,003.68 and 2,826.20

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Solution

The fourth proportional to 8,669, 13,003.68 and 2,826.20 is: 4,239.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,669 : 13,003.68 = 2,826.20 : x
  2. Step 2: Convert to fraction form
    8,669/13,003.68 = 2,826.20/x
  3. Step 3: Cross multiply
    8,669x = 13,003.68 × 2,826.20
  4. Step 4: Simplify right side
    8,669x = 36,751,000.42
  5. Step 5: Solve for x
    x = 36,751,000.42/8,669
  6. Step 6: Final answer
    x = 4,239.36

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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.