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Finding the Fourth Proportional to 18,912, 26,105.04 and 11,460

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Solution

The fourth proportional to 18,912, 26,105.04 and 11,460 is: 15,818.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,912 : 26,105.04 = 11,460 : x
  2. Step 2: Convert to fraction form
    18,912/26,105.04 = 11,460/x
  3. Step 3: Cross multiply
    18,912x = 26,105.04 × 11,460
  4. Step 4: Simplify right side
    18,912x = 299,163,758.40
  5. Step 5: Solve for x
    x = 299,163,758.40/18,912
  6. Step 6: Final answer
    x = 15,818.73

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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.