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Finding the Fourth Proportional to 7,909.98, 11,864.94 and 3,228.99

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Solution

The fourth proportional to 7,909.98, 11,864.94 and 3,228.99 is: 4,843.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,909.98 : 11,864.94 = 3,228.99 : x
  2. Step 2: Convert to fraction form
    7,909.98/11,864.94 = 3,228.99/x
  3. Step 3: Cross multiply
    7,909.98x = 11,864.94 × 3,228.99
  4. Step 4: Simplify right side
    7,909.98x = 38,311,772.61
  5. Step 5: Solve for x
    x = 38,311,772.61/7,909.98
  6. Step 6: Final answer
    x = 4,843.47

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Similar ratio
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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.