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Finding the Fourth Proportional to 8,879.85, 13,320 and 4,202.05

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Solution

The fourth proportional to 8,879.85, 13,320 and 4,202.05 is: 6,303.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,879.85 : 13,320 = 4,202.05 : x
  2. Step 2: Convert to fraction form
    8,879.85/13,320 = 4,202.05/x
  3. Step 3: Cross multiply
    8,879.85x = 13,320 × 4,202.05
  4. Step 4: Simplify right side
    8,879.85x = 55,971,272.70
  5. Step 5: Solve for x
    x = 55,971,272.70/8,879.85
  6. Step 6: Final answer
    x = 6,303.18

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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.