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Finding the Fourth Proportional to 28,469.25, 42,619.77 and 21,024.27

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Solution

The fourth proportional to 28,469.25, 42,619.77 and 21,024.27 is: 31,474.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,469.25 : 42,619.77 = 21,024.27 : x
  2. Step 2: Convert to fraction form
    28,469.25/42,619.77 = 21,024.27/x
  3. Step 3: Cross multiply
    28,469.25x = 42,619.77 × 21,024.27
  4. Step 4: Simplify right side
    28,469.25x = 896,049,551.82
  5. Step 5: Solve for x
    x = 896,049,551.82/28,469.25
  6. Step 6: Final answer
    x = 31,474.29

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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.