Home / 21,250.20-31,826.70-20,764.20

Finding the Fourth Proportional to 21,250.20, 31,826.70 and 20,764.20

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Solution

The fourth proportional to 21,250.20, 31,826.70 and 20,764.20 is: 31,098.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,250.20 : 31,826.70 = 20,764.20 : x
  2. Step 2: Convert to fraction form
    21,250.20/31,826.70 = 20,764.20/x
  3. Step 3: Cross multiply
    21,250.20x = 31,826.70 × 20,764.20
  4. Step 4: Simplify right side
    21,250.20x = 660,855,964.14
  5. Step 5: Solve for x
    x = 660,855,964.14/21,250.20
  6. Step 6: Final answer
    x = 31,098.81

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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.