Home / 28,537.62-39,378.54-15,789.12

Finding the Fourth Proportional to 28,537.62, 39,378.54 and 15,789.12

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Solution

The fourth proportional to 28,537.62, 39,378.54 and 15,789.12 is: 21,787.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,537.62 : 39,378.54 = 15,789.12 : x
  2. Step 2: Convert to fraction form
    28,537.62/39,378.54 = 15,789.12/x
  3. Step 3: Cross multiply
    28,537.62x = 39,378.54 × 15,789.12
  4. Step 4: Simplify right side
    28,537.62x = 621,752,217.65
  5. Step 5: Solve for x
    x = 621,752,217.65/28,537.62
  6. Step 6: Final answer
    x = 21,787.11

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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.