Home / 13,989.72-20,983.92-5,223.96

Finding the Fourth Proportional to 13,989.72, 20,983.92 and 5,223.96

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Solution

The fourth proportional to 13,989.72, 20,983.92 and 5,223.96 is: 7,835.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,989.72 : 20,983.92 = 5,223.96 : x
  2. Step 2: Convert to fraction form
    13,989.72/20,983.92 = 5,223.96/x
  3. Step 3: Cross multiply
    13,989.72x = 20,983.92 × 5,223.96
  4. Step 4: Simplify right side
    13,989.72x = 109,619,158.72
  5. Step 5: Solve for x
    x = 109,619,158.72/13,989.72
  6. Step 6: Final answer
    x = 7,835.69

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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.