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Finding the Fourth Proportional to 18,278.72, 27,461.88 and 11,717.72

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Solution

The fourth proportional to 18,278.72, 27,461.88 and 11,717.72 is: 17,604.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,278.72 : 27,461.88 = 11,717.72 : x
  2. Step 2: Convert to fraction form
    18,278.72/27,461.88 = 11,717.72/x
  3. Step 3: Cross multiply
    18,278.72x = 27,461.88 × 11,717.72
  4. Step 4: Simplify right side
    18,278.72x = 321,790,620.51
  5. Step 5: Solve for x
    x = 321,790,620.51/18,278.72
  6. Step 6: Final answer
    x = 17,604.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.