Home / 28,725.50-39,640.61-15,978.24

Finding the Fourth Proportional to 28,725.50, 39,640.61 and 15,978.24

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Solution

The fourth proportional to 28,725.50, 39,640.61 and 15,978.24 is: 22,049.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,725.50 : 39,640.61 = 15,978.24 : x
  2. Step 2: Convert to fraction form
    28,725.50/39,640.61 = 15,978.24/x
  3. Step 3: Cross multiply
    28,725.50x = 39,640.61 × 15,978.24
  4. Step 4: Simplify right side
    28,725.50x = 633,387,220.27
  5. Step 5: Solve for x
    x = 633,387,220.27/28,725.50
  6. Step 6: Final answer
    x = 22,049.65

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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.