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Finding the Fourth Proportional to 8,909.99, 13,368.23 and 4,231.43

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Solution

The fourth proportional to 8,909.99, 13,368.23 and 4,231.43 is: 6,348.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,909.99 : 13,368.23 = 4,231.43 : x
  2. Step 2: Convert to fraction form
    8,909.99/13,368.23 = 4,231.43/x
  3. Step 3: Cross multiply
    8,909.99x = 13,368.23 × 4,231.43
  4. Step 4: Simplify right side
    8,909.99x = 56,566,729.47
  5. Step 5: Solve for x
    x = 56,566,729.47/8,909.99
  6. Step 6: Final answer
    x = 6,348.69

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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.