Home / 20,860.29-28,787.31-11,428.92

Finding the Fourth Proportional to 20,860.29, 28,787.31 and 11,428.92

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Solution

The fourth proportional to 20,860.29, 28,787.31 and 11,428.92 is: 15,771.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,860.29 : 28,787.31 = 11,428.92 : x
  2. Step 2: Convert to fraction form
    20,860.29/28,787.31 = 11,428.92/x
  3. Step 3: Cross multiply
    20,860.29x = 28,787.31 × 11,428.92
  4. Step 4: Simplify right side
    20,860.29x = 329,007,863.01
  5. Step 5: Solve for x
    x = 329,007,863.01/20,860.29
  6. Step 6: Final answer
    x = 15,771.97

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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.