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Finding the Fourth Proportional to 18,420.93, 27,610.88 and 7,324.65

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Solution

The fourth proportional to 18,420.93, 27,610.88 and 7,324.65 is: 10,978.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,420.93 : 27,610.88 = 7,324.65 : x
  2. Step 2: Convert to fraction form
    18,420.93/27,610.88 = 7,324.65/x
  3. Step 3: Cross multiply
    18,420.93x = 27,610.88 × 7,324.65
  4. Step 4: Simplify right side
    18,420.93x = 202,239,995.57
  5. Step 5: Solve for x
    x = 202,239,995.57/18,420.93
  6. Step 6: Final answer
    x = 10,978.82

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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.