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Finding the Fourth Proportional to 28,781.52, 43,169.16 and 7,723.68

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Solution

The fourth proportional to 28,781.52, 43,169.16 and 7,723.68 is: 11,584.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,781.52 : 43,169.16 = 7,723.68 : x
  2. Step 2: Convert to fraction form
    28,781.52/43,169.16 = 7,723.68/x
  3. Step 3: Cross multiply
    28,781.52x = 43,169.16 × 7,723.68
  4. Step 4: Simplify right side
    28,781.52x = 333,424,777.71
  5. Step 5: Solve for x
    x = 333,424,777.71/28,781.52
  6. Step 6: Final answer
    x = 11,584.68

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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.