Home / 20,826.90-31,220.28-7,672.08

Finding the Fourth Proportional to 20,826.90, 31,220.28 and 7,672.08

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Solution

The fourth proportional to 20,826.90, 31,220.28 and 7,672.08 is: 11,500.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,826.90 : 31,220.28 = 7,672.08 : x
  2. Step 2: Convert to fraction form
    20,826.90/31,220.28 = 7,672.08/x
  3. Step 3: Cross multiply
    20,826.90x = 31,220.28 × 7,672.08
  4. Step 4: Simplify right side
    20,826.90x = 239,524,485.78
  5. Step 5: Solve for x
    x = 239,524,485.78/20,826.90
  6. Step 6: Final answer
    x = 11,500.73

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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.