Home / 20,810.22-31,200.74-7,660.88

Finding the Fourth Proportional to 20,810.22, 31,200.74 and 7,660.88

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Solution

The fourth proportional to 20,810.22, 31,200.74 and 7,660.88 is: 11,485.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,810.22 : 31,200.74 = 7,660.88 : x
  2. Step 2: Convert to fraction form
    20,810.22/31,200.74 = 7,660.88/x
  3. Step 3: Cross multiply
    20,810.22x = 31,200.74 × 7,660.88
  4. Step 4: Simplify right side
    20,810.22x = 239,025,125.05
  5. Step 5: Solve for x
    x = 239,025,125.05/20,810.22
  6. Step 6: Final answer
    x = 11,485.95

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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.