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Finding the Fourth Proportional to 19,169.63, 28,754.45 and 5,318.63

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Solution

The fourth proportional to 19,169.63, 28,754.45 and 5,318.63 is: 7,977.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,169.63 : 28,754.45 = 5,318.63 : x
  2. Step 2: Convert to fraction form
    19,169.63/28,754.45 = 5,318.63/x
  3. Step 3: Cross multiply
    19,169.63x = 28,754.45 × 5,318.63
  4. Step 4: Simplify right side
    19,169.63x = 152,934,110.04
  5. Step 5: Solve for x
    x = 152,934,110.04/19,169.63
  6. Step 6: Final answer
    x = 7,977.94

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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.