Home / 20,969.24-31,408.50-9,859.28

Finding the Fourth Proportional to 20,969.24, 31,408.50 and 9,859.28

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Solution

The fourth proportional to 20,969.24, 31,408.50 and 9,859.28 is: 14,767.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,969.24 : 31,408.50 = 9,859.28 : x
  2. Step 2: Convert to fraction form
    20,969.24/31,408.50 = 9,859.28/x
  3. Step 3: Cross multiply
    20,969.24x = 31,408.50 × 9,859.28
  4. Step 4: Simplify right side
    20,969.24x = 309,665,195.88
  5. Step 5: Solve for x
    x = 309,665,195.88/20,969.24
  6. Step 6: Final answer
    x = 14,767.59

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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.