Home / 20,860.02-28,786.50-11,912.76

Finding the Fourth Proportional to 20,860.02, 28,786.50 and 11,912.76

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Solution

The fourth proportional to 20,860.02, 28,786.50 and 11,912.76 is: 16,439.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,860.02 : 28,786.50 = 11,912.76 : x
  2. Step 2: Convert to fraction form
    20,860.02/28,786.50 = 11,912.76/x
  3. Step 3: Cross multiply
    20,860.02x = 28,786.50 × 11,912.76
  4. Step 4: Simplify right side
    20,860.02x = 342,926,665.74
  5. Step 5: Solve for x
    x = 342,926,665.74/20,860.02
  6. Step 6: Final answer
    x = 16,439.42

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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.