Home / 20,920.24-31,380.96-6,129.17

Finding the Fourth Proportional to 20,920.24, 31,380.96 and 6,129.17

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Solution

The fourth proportional to 20,920.24, 31,380.96 and 6,129.17 is: 9,193.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,920.24 : 31,380.96 = 6,129.17 : x
  2. Step 2: Convert to fraction form
    20,920.24/31,380.96 = 6,129.17/x
  3. Step 3: Cross multiply
    20,920.24x = 31,380.96 × 6,129.17
  4. Step 4: Simplify right side
    20,920.24x = 192,339,238.60
  5. Step 5: Solve for x
    x = 192,339,238.60/20,920.24
  6. Step 6: Final answer
    x = 9,193.93

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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.