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Finding the Fourth Proportional to 39,856, 55,001.28 and 22,192

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Solution

The fourth proportional to 39,856, 55,001.28 and 22,192 is: 30,624.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,856 : 55,001.28 = 22,192 : x
  2. Step 2: Convert to fraction form
    39,856/55,001.28 = 22,192/x
  3. Step 3: Cross multiply
    39,856x = 55,001.28 × 22,192
  4. Step 4: Simplify right side
    39,856x = 1,220,588,405.76
  5. Step 5: Solve for x
    x = 1,220,588,405.76/39,856
  6. Step 6: Final answer
    x = 30,624.96

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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.