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Finding the Fourth Proportional to 8,920.80, 13,379.04 and 4,238.73

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Solution

The fourth proportional to 8,920.80, 13,379.04 and 4,238.73 is: 6,357.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,920.80 : 13,379.04 = 4,238.73 : x
  2. Step 2: Convert to fraction form
    8,920.80/13,379.04 = 4,238.73/x
  3. Step 3: Cross multiply
    8,920.80x = 13,379.04 × 4,238.73
  4. Step 4: Simplify right side
    8,920.80x = 56,710,138.22
  5. Step 5: Solve for x
    x = 56,710,138.22/8,920.80
  6. Step 6: Final answer
    x = 6,357.07

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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.