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Finding the Fourth Proportional to 8,879.69, 13,318.52 and 7,408.28

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Solution

The fourth proportional to 8,879.69, 13,318.52 and 7,408.28 is: 11,111.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,879.69 : 13,318.52 = 7,408.28 : x
  2. Step 2: Convert to fraction form
    8,879.69/13,318.52 = 7,408.28/x
  3. Step 3: Cross multiply
    8,879.69x = 13,318.52 × 7,408.28
  4. Step 4: Simplify right side
    8,879.69x = 98,667,321.60
  5. Step 5: Solve for x
    x = 98,667,321.60/8,879.69
  6. Step 6: Final answer
    x = 11,111.57

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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.