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Finding the Fourth Proportional to 20,614.64, 28,448.19 and 11,661.93

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Solution

The fourth proportional to 20,614.64, 28,448.19 and 11,661.93 is: 16,093.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,614.64 : 28,448.19 = 11,661.93 : x
  2. Step 2: Convert to fraction form
    20,614.64/28,448.19 = 11,661.93/x
  3. Step 3: Cross multiply
    20,614.64x = 28,448.19 × 11,661.93
  4. Step 4: Simplify right side
    20,614.64x = 331,760,800.41
  5. Step 5: Solve for x
    x = 331,760,800.41/20,614.64
  6. Step 6: Final answer
    x = 16,093.46

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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.