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Finding the Fourth Proportional to 18,842.58, 25,992.95 and 12,790.71

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Solution

The fourth proportional to 18,842.58, 25,992.95 and 12,790.71 is: 17,644.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,842.58 : 25,992.95 = 12,790.71 : x
  2. Step 2: Convert to fraction form
    18,842.58/25,992.95 = 12,790.71/x
  3. Step 3: Cross multiply
    18,842.58x = 25,992.95 × 12,790.71
  4. Step 4: Simplify right side
    18,842.58x = 332,468,221.54
  5. Step 5: Solve for x
    x = 332,468,221.54/18,842.58
  6. Step 6: Final answer
    x = 17,644.52

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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.