Home / 20,836.76-31,213.26-9,728.12

Finding the Fourth Proportional to 20,836.76, 31,213.26 and 9,728.12

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Solution

The fourth proportional to 20,836.76, 31,213.26 and 9,728.12 is: 14,572.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,836.76 : 31,213.26 = 9,728.12 : x
  2. Step 2: Convert to fraction form
    20,836.76/31,213.26 = 9,728.12/x
  3. Step 3: Cross multiply
    20,836.76x = 31,213.26 × 9,728.12
  4. Step 4: Simplify right side
    20,836.76x = 303,646,338.87
  5. Step 5: Solve for x
    x = 303,646,338.87/20,836.76
  6. Step 6: Final answer
    x = 14,572.63

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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.