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Finding the Fourth Proportional to 18,890.92, 26,067.10 and 12,771.94

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Solution

The fourth proportional to 18,890.92, 26,067.10 and 12,771.94 is: 17,623.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,890.92 : 26,067.10 = 12,771.94 : x
  2. Step 2: Convert to fraction form
    18,890.92/26,067.10 = 12,771.94/x
  3. Step 3: Cross multiply
    18,890.92x = 26,067.10 × 12,771.94
  4. Step 4: Simplify right side
    18,890.92x = 332,927,437.17
  5. Step 5: Solve for x
    x = 332,927,437.17/18,890.92
  6. Step 6: Final answer
    x = 17,623.68

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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.