Home / 28,361.27-39,138.53-15,788.99

Finding the Fourth Proportional to 28,361.27, 39,138.53 and 15,788.99

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Solution

The fourth proportional to 28,361.27, 39,138.53 and 15,788.99 is: 21,788.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,361.27 : 39,138.53 = 15,788.99 : x
  2. Step 2: Convert to fraction form
    28,361.27/39,138.53 = 15,788.99/x
  3. Step 3: Cross multiply
    28,361.27x = 39,138.53 × 15,788.99
  4. Step 4: Simplify right side
    28,361.27x = 617,957,702.56
  5. Step 5: Solve for x
    x = 617,957,702.56/28,361.27
  6. Step 6: Final answer
    x = 21,788.79

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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.