Home / 20,860.41-28,787.22-11,428.77

Finding the Fourth Proportional to 20,860.41, 28,787.22 and 11,428.77

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Solution

The fourth proportional to 20,860.41, 28,787.22 and 11,428.77 is: 15,771.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,860.41 : 28,787.22 = 11,428.77 : x
  2. Step 2: Convert to fraction form
    20,860.41/28,787.22 = 11,428.77/x
  3. Step 3: Cross multiply
    20,860.41x = 28,787.22 × 11,428.77
  4. Step 4: Simplify right side
    20,860.41x = 329,002,516.32
  5. Step 5: Solve for x
    x = 329,002,516.32/20,860.41
  6. Step 6: Final answer
    x = 15,771.62

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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.