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Finding the Fourth Proportional to 18,561.75, 25,615.22 and 10,178.43

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Solution

The fourth proportional to 18,561.75, 25,615.22 and 10,178.43 is: 14,046.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,561.75 : 25,615.22 = 10,178.43 : x
  2. Step 2: Convert to fraction form
    18,561.75/25,615.22 = 10,178.43/x
  3. Step 3: Cross multiply
    18,561.75x = 25,615.22 × 10,178.43
  4. Step 4: Simplify right side
    18,561.75x = 260,722,672.81
  5. Step 5: Solve for x
    x = 260,722,672.81/18,561.75
  6. Step 6: Final answer
    x = 14,046.23

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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.