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Finding the Fourth Proportional to 18,561.75, 25,610.78 and 10,495.57

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Solution

The fourth proportional to 18,561.75, 25,610.78 and 10,495.57 is: 14,481.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,561.75 : 25,610.78 = 10,495.57 : x
  2. Step 2: Convert to fraction form
    18,561.75/25,610.78 = 10,495.57/x
  3. Step 3: Cross multiply
    18,561.75x = 25,610.78 × 10,495.57
  4. Step 4: Simplify right side
    18,561.75x = 268,799,553.71
  5. Step 5: Solve for x
    x = 268,799,553.71/18,561.75
  6. Step 6: Final answer
    x = 14,481.37

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1.5x scale

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.