Home / 20,760.19-31,139.01-6,719.91

Finding the Fourth Proportional to 20,760.19, 31,139.01 and 6,719.91

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Solution

The fourth proportional to 20,760.19, 31,139.01 and 6,719.91 is: 10,079.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,760.19 : 31,139.01 = 6,719.91 : x
  2. Step 2: Convert to fraction form
    20,760.19/31,139.01 = 6,719.91/x
  3. Step 3: Cross multiply
    20,760.19x = 31,139.01 × 6,719.91
  4. Step 4: Simplify right side
    20,760.19x = 209,251,311.09
  5. Step 5: Solve for x
    x = 209,251,311.09/20,760.19
  6. Step 6: Final answer
    x = 10,079.45

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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.