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Finding the Fourth Proportional to 13,979.79, 20,997.02 and 12,004.81

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Solution

The fourth proportional to 13,979.79, 20,997.02 and 12,004.81 is: 18,030.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,979.79 : 20,997.02 = 12,004.81 : x
  2. Step 2: Convert to fraction form
    13,979.79/20,997.02 = 12,004.81/x
  3. Step 3: Cross multiply
    13,979.79x = 20,997.02 × 12,004.81
  4. Step 4: Simplify right side
    13,979.79x = 252,065,213.19
  5. Step 5: Solve for x
    x = 252,065,213.19/13,979.79
  6. Step 6: Final answer
    x = 18,030.69

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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.