Home / 20,912.12-28,860.56-11,482.52

Finding the Fourth Proportional to 20,912.12, 28,860.56 and 11,482.52

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Solution

The fourth proportional to 20,912.12, 28,860.56 and 11,482.52 is: 15,846.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,912.12 : 28,860.56 = 11,482.52 : x
  2. Step 2: Convert to fraction form
    20,912.12/28,860.56 = 11,482.52/x
  3. Step 3: Cross multiply
    20,912.12x = 28,860.56 × 11,482.52
  4. Step 4: Simplify right side
    20,912.12x = 331,391,957.41
  5. Step 5: Solve for x
    x = 331,391,957.41/20,912.12
  6. Step 6: Final answer
    x = 15,846.88

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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.