Home / 20,415.39-30,625.01-7,936.38

Finding the Fourth Proportional to 20,415.39, 30,625.01 and 7,936.38

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Solution

The fourth proportional to 20,415.39, 30,625.01 and 7,936.38 is: 11,905.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,415.39 : 30,625.01 = 7,936.38 : x
  2. Step 2: Convert to fraction form
    20,415.39/30,625.01 = 7,936.38/x
  3. Step 3: Cross multiply
    20,415.39x = 30,625.01 × 7,936.38
  4. Step 4: Simplify right side
    20,415.39x = 243,051,716.86
  5. Step 5: Solve for x
    x = 243,051,716.86/20,415.39
  6. Step 6: Final answer
    x = 11,905.32

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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.