Home / 30,121.21-45,177.96-7,936.30

Finding the Fourth Proportional to 30,121.21, 45,177.96 and 7,936.30

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Solution

The fourth proportional to 30,121.21, 45,177.96 and 7,936.30 is: 11,903.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,121.21 : 45,177.96 = 7,936.30 : x
  2. Step 2: Convert to fraction form
    30,121.21/45,177.96 = 7,936.30/x
  3. Step 3: Cross multiply
    30,121.21x = 45,177.96 × 7,936.30
  4. Step 4: Simplify right side
    30,121.21x = 358,545,843.95
  5. Step 5: Solve for x
    x = 358,545,843.95/30,121.21
  6. Step 6: Final answer
    x = 11,903.43

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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.