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Finding the Fourth Proportional to 18,390.92, 27,602.30 and 9,631.96

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Solution

The fourth proportional to 18,390.92, 27,602.30 and 9,631.96 is: 14,456.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,390.92 : 27,602.30 = 9,631.96 : x
  2. Step 2: Convert to fraction form
    18,390.92/27,602.30 = 9,631.96/x
  3. Step 3: Cross multiply
    18,390.92x = 27,602.30 × 9,631.96
  4. Step 4: Simplify right side
    18,390.92x = 265,864,249.51
  5. Step 5: Solve for x
    x = 265,864,249.51/18,390.92
  6. Step 6: Final answer
    x = 14,456.28

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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.