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Finding the Fourth Proportional to 20,472.51, 28,252 and 11,520.03

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Solution

The fourth proportional to 20,472.51, 28,252 and 11,520.03 is: 15,897.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,472.51 : 28,252 = 11,520.03 : x
  2. Step 2: Convert to fraction form
    20,472.51/28,252 = 11,520.03/x
  3. Step 3: Cross multiply
    20,472.51x = 28,252 × 11,520.03
  4. Step 4: Simplify right side
    20,472.51x = 325,463,887.56
  5. Step 5: Solve for x
    x = 325,463,887.56/20,472.51
  6. Step 6: Final answer
    x = 15,897.61

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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.