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Finding the Fourth Proportional to 19,171.76, 28,761.96 and 7,488.32

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Solution

The fourth proportional to 19,171.76, 28,761.96 and 7,488.32 is: 11,234.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,171.76 : 28,761.96 = 7,488.32 : x
  2. Step 2: Convert to fraction form
    19,171.76/28,761.96 = 7,488.32/x
  3. Step 3: Cross multiply
    19,171.76x = 28,761.96 × 7,488.32
  4. Step 4: Simplify right side
    19,171.76x = 215,378,760.31
  5. Step 5: Solve for x
    x = 215,378,760.31/19,171.76
  6. Step 6: Final answer
    x = 11,234.17

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1.5x scale

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.