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Finding the Fourth Proportional to 18,305.31, 27,451.47 and 7,911.39

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Solution

The fourth proportional to 18,305.31, 27,451.47 and 7,911.39 is: 11,864.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,305.31 : 27,451.47 = 7,911.39 : x
  2. Step 2: Convert to fraction form
    18,305.31/27,451.47 = 7,911.39/x
  3. Step 3: Cross multiply
    18,305.31x = 27,451.47 × 7,911.39
  4. Step 4: Simplify right side
    18,305.31x = 217,179,285.24
  5. Step 5: Solve for x
    x = 217,179,285.24/18,305.31
  6. Step 6: Final answer
    x = 11,864.28

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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.