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Finding the Fourth Proportional to 8,879.42, 13,314.81 and 4,721.42

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Solution

The fourth proportional to 8,879.42, 13,314.81 and 4,721.42 is: 7,079.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,879.42 : 13,314.81 = 4,721.42 : x
  2. Step 2: Convert to fraction form
    8,879.42/13,314.81 = 4,721.42/x
  3. Step 3: Cross multiply
    8,879.42x = 13,314.81 × 4,721.42
  4. Step 4: Simplify right side
    8,879.42x = 62,864,810.23
  5. Step 5: Solve for x
    x = 62,864,810.23/8,879.42
  6. Step 6: Final answer
    x = 7,079.83

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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.