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Finding the Fourth Proportional to 9,991.76, 14,982.82 and 4,722.40

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Solution

The fourth proportional to 9,991.76, 14,982.82 and 4,722.40 is: 7,081.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,991.76 : 14,982.82 = 4,722.40 : x
  2. Step 2: Convert to fraction form
    9,991.76/14,982.82 = 4,722.40/x
  3. Step 3: Cross multiply
    9,991.76x = 14,982.82 × 4,722.40
  4. Step 4: Simplify right side
    9,991.76x = 70,754,902.65
  5. Step 5: Solve for x
    x = 70,754,902.65/9,991.76
  6. Step 6: Final answer
    x = 7,081.33

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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.