Home / 21,208.20-31,763.70-20,722.20

Finding the Fourth Proportional to 21,208.20, 31,763.70 and 20,722.20

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Solution

The fourth proportional to 21,208.20, 31,763.70 and 20,722.20 is: 31,035.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,208.20 : 31,763.70 = 20,722.20 : x
  2. Step 2: Convert to fraction form
    21,208.20/31,763.70 = 20,722.20/x
  3. Step 3: Cross multiply
    21,208.20x = 31,763.70 × 20,722.20
  4. Step 4: Simplify right side
    21,208.20x = 658,213,744.14
  5. Step 5: Solve for x
    x = 658,213,744.14/21,208.20
  6. Step 6: Final answer
    x = 31,035.81

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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.