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Finding the Fourth Proportional to 19,273.28, 28,909.92 and 6,961.28

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Solution

The fourth proportional to 19,273.28, 28,909.92 and 6,961.28 is: 10,441.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,273.28 : 28,909.92 = 6,961.28 : x
  2. Step 2: Convert to fraction form
    19,273.28/28,909.92 = 6,961.28/x
  3. Step 3: Cross multiply
    19,273.28x = 28,909.92 × 6,961.28
  4. Step 4: Simplify right side
    19,273.28x = 201,250,047.90
  5. Step 5: Solve for x
    x = 201,250,047.90/19,273.28
  6. Step 6: Final answer
    x = 10,441.92

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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.