Home / 18,814.80-28,220.22-7,722.66

Finding the Fourth Proportional to 18,814.80, 28,220.22 and 7,722.66

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Solution

The fourth proportional to 18,814.80, 28,220.22 and 7,722.66 is: 11,583.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,814.80 : 28,220.22 = 7,722.66 : x
  2. Step 2: Convert to fraction form
    18,814.80/28,220.22 = 7,722.66/x
  3. Step 3: Cross multiply
    18,814.80x = 28,220.22 × 7,722.66
  4. Step 4: Simplify right side
    18,814.80x = 217,935,164.19
  5. Step 5: Solve for x
    x = 217,935,164.19/18,814.80
  6. Step 6: Final answer
    x = 11,583.18

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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.