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Finding the Fourth Proportional to 18,361.75, 25,339.22 and 10,909.75

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Solution

The fourth proportional to 18,361.75, 25,339.22 and 10,909.75 is: 15,055.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,361.75 : 25,339.22 = 10,909.75 : x
  2. Step 2: Convert to fraction form
    18,361.75/25,339.22 = 10,909.75/x
  3. Step 3: Cross multiply
    18,361.75x = 25,339.22 × 10,909.75
  4. Step 4: Simplify right side
    18,361.75x = 276,444,555.40
  5. Step 5: Solve for x
    x = 276,444,555.40/18,361.75
  6. Step 6: Final answer
    x = 15,055.46

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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.