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Finding the Fourth Proportional to 28,996.81, 40,027.85 and 19,578.13

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Solution

The fourth proportional to 28,996.81, 40,027.85 and 19,578.13 is: 27,026.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,996.81 : 40,027.85 = 19,578.13 : x
  2. Step 2: Convert to fraction form
    28,996.81/40,027.85 = 19,578.13/x
  3. Step 3: Cross multiply
    28,996.81x = 40,027.85 × 19,578.13
  4. Step 4: Simplify right side
    28,996.81x = 783,670,450.92
  5. Step 5: Solve for x
    x = 783,670,450.92/28,996.81
  6. Step 6: Final answer
    x = 27,026.09

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.