Home / 28,536.25-39,378.76-15,790.14

Finding the Fourth Proportional to 28,536.25, 39,378.76 and 15,790.14

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Solution

The fourth proportional to 28,536.25, 39,378.76 and 15,790.14 is: 21,789.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,536.25 : 39,378.76 = 15,790.14 : x
  2. Step 2: Convert to fraction form
    28,536.25/39,378.76 = 15,790.14/x
  3. Step 3: Cross multiply
    28,536.25x = 39,378.76 × 15,790.14
  4. Step 4: Simplify right side
    28,536.25x = 621,796,093.95
  5. Step 5: Solve for x
    x = 621,796,093.95/28,536.25
  6. Step 6: Final answer
    x = 21,789.69

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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.