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Finding the Fourth Proportional to 19,160.92, 28,724.32 and 7,471.45

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Solution

The fourth proportional to 19,160.92, 28,724.32 and 7,471.45 is: 11,200.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,160.92 : 28,724.32 = 7,471.45 : x
  2. Step 2: Convert to fraction form
    19,160.92/28,724.32 = 7,471.45/x
  3. Step 3: Cross multiply
    19,160.92x = 28,724.32 × 7,471.45
  4. Step 4: Simplify right side
    19,160.92x = 214,612,320.66
  5. Step 5: Solve for x
    x = 214,612,320.66/19,160.92
  6. Step 6: Final answer
    x = 11,200.52

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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.