Home / 20,418.33-30,619.57-7,936.71

Finding the Fourth Proportional to 20,418.33, 30,619.57 and 7,936.71

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Solution

The fourth proportional to 20,418.33, 30,619.57 and 7,936.71 is: 11,901.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,418.33 : 30,619.57 = 7,936.71 : x
  2. Step 2: Convert to fraction form
    20,418.33/30,619.57 = 7,936.71/x
  3. Step 3: Cross multiply
    20,418.33x = 30,619.57 × 7,936.71
  4. Step 4: Simplify right side
    20,418.33x = 243,018,647.41
  5. Step 5: Solve for x
    x = 243,018,647.41/20,418.33
  6. Step 6: Final answer
    x = 11,901.98

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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.