Home / 14,005.20-20,989.17-5,231.28

Finding the Fourth Proportional to 14,005.20, 20,989.17 and 5,231.28

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Solution

The fourth proportional to 14,005.20, 20,989.17 and 5,231.28 is: 7,839.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,005.20 : 20,989.17 = 5,231.28 : x
  2. Step 2: Convert to fraction form
    14,005.20/20,989.17 = 5,231.28/x
  3. Step 3: Cross multiply
    14,005.20x = 20,989.17 × 5,231.28
  4. Step 4: Simplify right side
    14,005.20x = 109,800,225.24
  5. Step 5: Solve for x
    x = 109,800,225.24/14,005.20
  6. Step 6: Final answer
    x = 7,839.96

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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.