Home / 28,391.42-39,179.37-15,644.66

Finding the Fourth Proportional to 28,391.42, 39,179.37 and 15,644.66

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Solution

The fourth proportional to 28,391.42, 39,179.37 and 15,644.66 is: 21,589.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,391.42 : 39,179.37 = 15,644.66 : x
  2. Step 2: Convert to fraction form
    28,391.42/39,179.37 = 15,644.66/x
  3. Step 3: Cross multiply
    28,391.42x = 39,179.37 × 15,644.66
  4. Step 4: Simplify right side
    28,391.42x = 612,947,922.66
  5. Step 5: Solve for x
    x = 612,947,922.66/28,391.42
  6. Step 6: Final answer
    x = 21,589.20

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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.