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Finding the Fourth Proportional to 28,641.25, 39,524.73 and 15,894.31

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Solution

The fourth proportional to 28,641.25, 39,524.73 and 15,894.31 is: 21,934.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,641.25 : 39,524.73 = 15,894.31 : x
  2. Step 2: Convert to fraction form
    28,641.25/39,524.73 = 15,894.31/x
  3. Step 3: Cross multiply
    28,641.25x = 39,524.73 × 15,894.31
  4. Step 4: Simplify right side
    28,641.25x = 628,218,311.29
  5. Step 5: Solve for x
    x = 628,218,311.29/28,641.25
  6. Step 6: Final answer
    x = 21,934.04

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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.