Home / 20,530.28-30,807.30-11,171.27

Finding the Fourth Proportional to 20,530.28, 30,807.30 and 11,171.27

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Solution

The fourth proportional to 20,530.28, 30,807.30 and 11,171.27 is: 16,763.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,530.28 : 30,807.30 = 11,171.27 : x
  2. Step 2: Convert to fraction form
    20,530.28/30,807.30 = 11,171.27/x
  3. Step 3: Cross multiply
    20,530.28x = 30,807.30 × 11,171.27
  4. Step 4: Simplify right side
    20,530.28x = 344,156,785.18
  5. Step 5: Solve for x
    x = 344,156,785.18/20,530.28
  6. Step 6: Final answer
    x = 16,763.37

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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.