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Finding the Fourth Proportional to 8,967.99, 13,451.99 and 3,120.50

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Solution

The fourth proportional to 8,967.99, 13,451.99 and 3,120.50 is: 4,680.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,967.99 : 13,451.99 = 3,120.50 : x
  2. Step 2: Convert to fraction form
    8,967.99/13,451.99 = 3,120.50/x
  3. Step 3: Cross multiply
    8,967.99x = 13,451.99 × 3,120.50
  4. Step 4: Simplify right side
    8,967.99x = 41,976,934.80
  5. Step 5: Solve for x
    x = 41,976,934.80/8,967.99
  6. Step 6: Final answer
    x = 4,680.75

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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.