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Finding the Fourth Proportional to 8,813.91, 13,221.17 and 4,428.98

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Solution

The fourth proportional to 8,813.91, 13,221.17 and 4,428.98 is: 6,643.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,813.91 : 13,221.17 = 4,428.98 : x
  2. Step 2: Convert to fraction form
    8,813.91/13,221.17 = 4,428.98/x
  3. Step 3: Cross multiply
    8,813.91x = 13,221.17 × 4,428.98
  4. Step 4: Simplify right side
    8,813.91x = 58,556,209.26
  5. Step 5: Solve for x
    x = 58,556,209.26/8,813.91
  6. Step 6: Final answer
    x = 6,643.61

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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.