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Finding the Fourth Proportional to 18,421.92, 27,630.72 and 5,274

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Solution

The fourth proportional to 18,421.92, 27,630.72 and 5,274 is: 7,910.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,421.92 : 27,630.72 = 5,274 : x
  2. Step 2: Convert to fraction form
    18,421.92/27,630.72 = 5,274/x
  3. Step 3: Cross multiply
    18,421.92x = 27,630.72 × 5,274
  4. Step 4: Simplify right side
    18,421.92x = 145,724,417.28
  5. Step 5: Solve for x
    x = 145,724,417.28/18,421.92
  6. Step 6: Final answer
    x = 7,910.38

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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.