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Finding the Fourth Proportional to 28,429, 39,232.83 and 15,854.56

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Solution

The fourth proportional to 28,429, 39,232.83 and 15,854.56 is: 21,879.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,429 : 39,232.83 = 15,854.56 : x
  2. Step 2: Convert to fraction form
    28,429/39,232.83 = 15,854.56/x
  3. Step 3: Cross multiply
    28,429x = 39,232.83 × 15,854.56
  4. Step 4: Simplify right side
    28,429x = 622,019,257.20
  5. Step 5: Solve for x
    x = 622,019,257.20/28,429
  6. Step 6: Final answer
    x = 21,879.74

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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.