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Finding the Fourth Proportional to 28,554, 39,418.20 and 19,009.80

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Solution

The fourth proportional to 28,554, 39,418.20 and 19,009.80 is: 26,242.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,554 : 39,418.20 = 19,009.80 : x
  2. Step 2: Convert to fraction form
    28,554/39,418.20 = 19,009.80/x
  3. Step 3: Cross multiply
    28,554x = 39,418.20 × 19,009.80
  4. Step 4: Simplify right side
    28,554x = 749,332,098.36
  5. Step 5: Solve for x
    x = 749,332,098.36/28,554
  6. Step 6: Final answer
    x = 26,242.63

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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.