Home / 28,640.94-39,522.48-15,894.78

Finding the Fourth Proportional to 28,640.94, 39,522.48 and 15,894.78

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Solution

The fourth proportional to 28,640.94, 39,522.48 and 15,894.78 is: 21,933.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,640.94 : 39,522.48 = 15,894.78 : x
  2. Step 2: Convert to fraction form
    28,640.94/39,522.48 = 15,894.78/x
  3. Step 3: Cross multiply
    28,640.94x = 39,522.48 × 15,894.78
  4. Step 4: Simplify right side
    28,640.94x = 628,201,124.65
  5. Step 5: Solve for x
    x = 628,201,124.65/28,640.94
  6. Step 6: Final answer
    x = 21,933.68

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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.