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Finding the Fourth Proportional to 19,251.20, 28,828.20 and 15,363.20

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Solution

The fourth proportional to 19,251.20, 28,828.20 and 15,363.20 is: 23,006.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,251.20 : 28,828.20 = 15,363.20 : x
  2. Step 2: Convert to fraction form
    19,251.20/28,828.20 = 15,363.20/x
  3. Step 3: Cross multiply
    19,251.20x = 28,828.20 × 15,363.20
  4. Step 4: Simplify right side
    19,251.20x = 442,893,402.24
  5. Step 5: Solve for x
    x = 442,893,402.24/19,251.20
  6. Step 6: Final answer
    x = 23,006.02

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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.