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Finding the Fourth Proportional to 19,233.20, 28,866.20 and 8,719.20

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Solution

The fourth proportional to 19,233.20, 28,866.20 and 8,719.20 is: 13,086.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,233.20 : 28,866.20 = 8,719.20 : x
  2. Step 2: Convert to fraction form
    19,233.20/28,866.20 = 8,719.20/x
  3. Step 3: Cross multiply
    19,233.20x = 28,866.20 × 8,719.20
  4. Step 4: Simplify right side
    19,233.20x = 251,690,171.04
  5. Step 5: Solve for x
    x = 251,690,171.04/19,233.20
  6. Step 6: Final answer
    x = 13,086.23

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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.