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Finding the Fourth Proportional to 18,661.73, 25,758.47 and 12,292.97

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Solution

The fourth proportional to 18,661.73, 25,758.47 and 12,292.97 is: 16,967.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,661.73 : 25,758.47 = 12,292.97 : x
  2. Step 2: Convert to fraction form
    18,661.73/25,758.47 = 12,292.97/x
  3. Step 3: Cross multiply
    18,661.73x = 25,758.47 × 12,292.97
  4. Step 4: Simplify right side
    18,661.73x = 316,648,000.90
  5. Step 5: Solve for x
    x = 316,648,000.90/18,661.73
  6. Step 6: Final answer
    x = 16,967.78

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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.