Home / 20,913.23-28,860.71-11,961.56

Finding the Fourth Proportional to 20,913.23, 28,860.71 and 11,961.56

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Solution

The fourth proportional to 20,913.23, 28,860.71 and 11,961.56 is: 16,507.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,913.23 : 28,860.71 = 11,961.56 : x
  2. Step 2: Convert to fraction form
    20,913.23/28,860.71 = 11,961.56/x
  3. Step 3: Cross multiply
    20,913.23x = 28,860.71 × 11,961.56
  4. Step 4: Simplify right side
    20,913.23x = 345,218,910.20
  5. Step 5: Solve for x
    x = 345,218,910.20/20,913.23
  6. Step 6: Final answer
    x = 16,507.21

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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.