Home / 30,391.04-41,997.60-21,920.96

Finding the Fourth Proportional to 30,391.04, 41,997.60 and 21,920.96

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Solution

The fourth proportional to 30,391.04, 41,997.60 and 21,920.96 is: 30,292.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,391.04 : 41,997.60 = 21,920.96 : x
  2. Step 2: Convert to fraction form
    30,391.04/41,997.60 = 21,920.96/x
  3. Step 3: Cross multiply
    30,391.04x = 41,997.60 × 21,920.96
  4. Step 4: Simplify right side
    30,391.04x = 920,627,709.70
  5. Step 5: Solve for x
    x = 920,627,709.70/30,391.04
  6. Step 6: Final answer
    x = 30,292.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.