Home / 28,363.38-39,139.11-15,788.94

Finding the Fourth Proportional to 28,363.38, 39,139.11 and 15,788.94

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Solution

The fourth proportional to 28,363.38, 39,139.11 and 15,788.94 is: 21,787.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,363.38 : 39,139.11 = 15,788.94 : x
  2. Step 2: Convert to fraction form
    28,363.38/39,139.11 = 15,788.94/x
  3. Step 3: Cross multiply
    28,363.38x = 39,139.11 × 15,788.94
  4. Step 4: Simplify right side
    28,363.38x = 617,965,059.44
  5. Step 5: Solve for x
    x = 617,965,059.44/28,363.38
  6. Step 6: Final answer
    x = 21,787.43

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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.