Home / 20,912.19-28,858.84-11,352.07

Finding the Fourth Proportional to 20,912.19, 28,858.84 and 11,352.07

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Solution

The fourth proportional to 20,912.19, 28,858.84 and 11,352.07 is: 15,665.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,912.19 : 28,858.84 = 11,352.07 : x
  2. Step 2: Convert to fraction form
    20,912.19/28,858.84 = 11,352.07/x
  3. Step 3: Cross multiply
    20,912.19x = 28,858.84 × 11,352.07
  4. Step 4: Simplify right side
    20,912.19x = 327,607,499.65
  5. Step 5: Solve for x
    x = 327,607,499.65/20,912.19
  6. Step 6: Final answer
    x = 15,665.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.