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Finding the Fourth Proportional to 18,600, 25,669.20 and 10,644.80

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Solution

The fourth proportional to 18,600, 25,669.20 and 10,644.80 is: 14,690.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,600 : 25,669.20 = 10,644.80 : x
  2. Step 2: Convert to fraction form
    18,600/25,669.20 = 10,644.80/x
  3. Step 3: Cross multiply
    18,600x = 25,669.20 × 10,644.80
  4. Step 4: Simplify right side
    18,600x = 273,243,500.16
  5. Step 5: Solve for x
    x = 273,243,500.16/18,600
  6. Step 6: Final answer
    x = 14,690.51

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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.