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Finding the Fourth Proportional to 18,555.92, 27,796.79 and 11,156.31

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Solution

The fourth proportional to 18,555.92, 27,796.79 and 11,156.31 is: 16,712.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,555.92 : 27,796.79 = 11,156.31 : x
  2. Step 2: Convert to fraction form
    18,555.92/27,796.79 = 11,156.31/x
  3. Step 3: Cross multiply
    18,555.92x = 27,796.79 × 11,156.31
  4. Step 4: Simplify right side
    18,555.92x = 310,109,550.46
  5. Step 5: Solve for x
    x = 310,109,550.46/18,555.92
  6. Step 6: Final answer
    x = 16,712.17

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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.