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Finding the Fourth Proportional to 18,211.25, 25,131.49 and 10,253.51

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Solution

The fourth proportional to 18,211.25, 25,131.49 and 10,253.51 is: 14,149.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,211.25 : 25,131.49 = 10,253.51 : x
  2. Step 2: Convert to fraction form
    18,211.25/25,131.49 = 10,253.51/x
  3. Step 3: Cross multiply
    18,211.25x = 25,131.49 × 10,253.51
  4. Step 4: Simplify right side
    18,211.25x = 257,685,984.03
  5. Step 5: Solve for x
    x = 257,685,984.03/18,211.25
  6. Step 6: Final answer
    x = 14,149.82

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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.