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Finding the Fourth Proportional to 18,722.65, 28,087.95 and 7,035.97

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Solution

The fourth proportional to 18,722.65, 28,087.95 and 7,035.97 is: 10,555.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,722.65 : 28,087.95 = 7,035.97 : x
  2. Step 2: Convert to fraction form
    18,722.65/28,087.95 = 7,035.97/x
  3. Step 3: Cross multiply
    18,722.65x = 28,087.95 × 7,035.97
  4. Step 4: Simplify right side
    18,722.65x = 197,625,973.56
  5. Step 5: Solve for x
    x = 197,625,973.56/18,722.65
  6. Step 6: Final answer
    x = 10,555.45

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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.