Home / 20,755.65-28,642.70-11,324.21

Finding the Fourth Proportional to 20,755.65, 28,642.70 and 11,324.21

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Solution

The fourth proportional to 20,755.65, 28,642.70 and 11,324.21 is: 15,627.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,755.65 : 28,642.70 = 11,324.21 : x
  2. Step 2: Convert to fraction form
    20,755.65/28,642.70 = 11,324.21/x
  3. Step 3: Cross multiply
    20,755.65x = 28,642.70 × 11,324.21
  4. Step 4: Simplify right side
    20,755.65x = 324,355,964.75
  5. Step 5: Solve for x
    x = 324,355,964.75/20,755.65
  6. Step 6: Final answer
    x = 15,627.36

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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.