Home / 20,860.26-28,787.01-11,428.92

Finding the Fourth Proportional to 20,860.26, 28,787.01 and 11,428.92

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Solution

The fourth proportional to 20,860.26, 28,787.01 and 11,428.92 is: 15,771.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,860.26 : 28,787.01 = 11,428.92 : x
  2. Step 2: Convert to fraction form
    20,860.26/28,787.01 = 11,428.92/x
  3. Step 3: Cross multiply
    20,860.26x = 28,787.01 × 11,428.92
  4. Step 4: Simplify right side
    20,860.26x = 329,004,434.33
  5. Step 5: Solve for x
    x = 329,004,434.33/20,860.26
  6. Step 6: Final answer
    x = 15,771.83

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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.