Home / 20,145.82-30,214.15-7,661.41

Finding the Fourth Proportional to 20,145.82, 30,214.15 and 7,661.41

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Solution

The fourth proportional to 20,145.82, 30,214.15 and 7,661.41 is: 11,490.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,145.82 : 30,214.15 = 7,661.41 : x
  2. Step 2: Convert to fraction form
    20,145.82/30,214.15 = 7,661.41/x
  3. Step 3: Cross multiply
    20,145.82x = 30,214.15 × 7,661.41
  4. Step 4: Simplify right side
    20,145.82x = 231,482,990.95
  5. Step 5: Solve for x
    x = 231,482,990.95/20,145.82
  6. Step 6: Final answer
    x = 11,490.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.