Home / 28,640.79-39,524.20-15,895.89

Finding the Fourth Proportional to 28,640.79, 39,524.20 and 15,895.89

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Solution

The fourth proportional to 28,640.79, 39,524.20 and 15,895.89 is: 21,936.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,640.79 : 39,524.20 = 15,895.89 : x
  2. Step 2: Convert to fraction form
    28,640.79/39,524.20 = 15,895.89/x
  3. Step 3: Cross multiply
    28,640.79x = 39,524.20 × 15,895.89
  4. Step 4: Simplify right side
    28,640.79x = 628,272,335.54
  5. Step 5: Solve for x
    x = 628,272,335.54/28,640.79
  6. Step 6: Final answer
    x = 21,936.28

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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.