Home / 28,538.62-39,379.91-15,790.12

Finding the Fourth Proportional to 28,538.62, 39,379.91 and 15,790.12

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Solution

The fourth proportional to 28,538.62, 39,379.91 and 15,790.12 is: 21,788.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,538.62 : 39,379.91 = 15,790.12 : x
  2. Step 2: Convert to fraction form
    28,538.62/39,379.91 = 15,790.12/x
  3. Step 3: Cross multiply
    28,538.62x = 39,379.91 × 15,790.12
  4. Step 4: Simplify right side
    28,538.62x = 621,813,504.49
  5. Step 5: Solve for x
    x = 621,813,504.49/28,538.62
  6. Step 6: Final answer
    x = 21,788.49

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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.