Home / 20,867.25-31,313.18-7,728.85

Finding the Fourth Proportional to 20,867.25, 31,313.18 and 7,728.85

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Solution

The fourth proportional to 20,867.25, 31,313.18 and 7,728.85 is: 11,597.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,867.25 : 31,313.18 = 7,728.85 : x
  2. Step 2: Convert to fraction form
    20,867.25/31,313.18 = 7,728.85/x
  3. Step 3: Cross multiply
    20,867.25x = 31,313.18 × 7,728.85
  4. Step 4: Simplify right side
    20,867.25x = 242,014,871.24
  5. Step 5: Solve for x
    x = 242,014,871.24/20,867.25
  6. Step 6: Final answer
    x = 11,597.83

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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.