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Finding the Fourth Proportional to 19,155.84, 28,695.36 and 8,753.28

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Solution

The fourth proportional to 19,155.84, 28,695.36 and 8,753.28 is: 13,112.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,155.84 : 28,695.36 = 8,753.28 : x
  2. Step 2: Convert to fraction form
    19,155.84/28,695.36 = 8,753.28/x
  3. Step 3: Cross multiply
    19,155.84x = 28,695.36 × 8,753.28
  4. Step 4: Simplify right side
    19,155.84x = 251,178,520.78
  5. Step 5: Solve for x
    x = 251,178,520.78/19,155.84
  6. Step 6: Final answer
    x = 13,112.37

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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.