Home / 20,719.56-31,079.30-5,137.18

Finding the Fourth Proportional to 20,719.56, 31,079.30 and 5,137.18

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Solution

The fourth proportional to 20,719.56, 31,079.30 and 5,137.18 is: 7,705.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,719.56 : 31,079.30 = 5,137.18 : x
  2. Step 2: Convert to fraction form
    20,719.56/31,079.30 = 5,137.18/x
  3. Step 3: Cross multiply
    20,719.56x = 31,079.30 × 5,137.18
  4. Step 4: Simplify right side
    20,719.56x = 159,659,958.37
  5. Step 5: Solve for x
    x = 159,659,958.37/20,719.56
  6. Step 6: Final answer
    x = 7,705.76

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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.