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Finding the Fourth Proportional to 8,739.85, 13,078.98 and 5,454.49

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Solution

The fourth proportional to 8,739.85, 13,078.98 and 5,454.49 is: 8,162.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,739.85 : 13,078.98 = 5,454.49 : x
  2. Step 2: Convert to fraction form
    8,739.85/13,078.98 = 5,454.49/x
  3. Step 3: Cross multiply
    8,739.85x = 13,078.98 × 5,454.49
  4. Step 4: Simplify right side
    8,739.85x = 71,339,165.62
  5. Step 5: Solve for x
    x = 71,339,165.62/8,739.85
  6. Step 6: Final answer
    x = 8,162.52

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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.