Home / 20,729.28-31,074.60-8,246.90

Finding the Fourth Proportional to 20,729.28, 31,074.60 and 8,246.90

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Solution

The fourth proportional to 20,729.28, 31,074.60 and 8,246.90 is: 12,362.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,729.28 : 31,074.60 = 8,246.90 : x
  2. Step 2: Convert to fraction form
    20,729.28/31,074.60 = 8,246.90/x
  3. Step 3: Cross multiply
    20,729.28x = 31,074.60 × 8,246.90
  4. Step 4: Simplify right side
    20,729.28x = 256,269,118.74
  5. Step 5: Solve for x
    x = 256,269,118.74/20,729.28
  6. Step 6: Final answer
    x = 12,362.66

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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.