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Finding the Fourth Proportional to 20,993.00, 28,972.99 and 12,040.31

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Solution

The fourth proportional to 20,993.00, 28,972.99 and 12,040.31 is: 16,617.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,993.00 : 28,972.99 = 12,040.31 : x
  2. Step 2: Convert to fraction form
    20,993.00/28,972.99 = 12,040.31/x
  3. Step 3: Cross multiply
    20,993.00x = 28,972.99 × 12,040.31
  4. Step 4: Simplify right side
    20,993.00x = 348,843,648.59
  5. Step 5: Solve for x
    x = 348,843,648.59/20,993.00
  6. Step 6: Final answer
    x = 16,617.14

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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.