Home / 20,937.21-31,388.16-9,082.06

Finding the Fourth Proportional to 20,937.21, 31,388.16 and 9,082.06

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Solution

The fourth proportional to 20,937.21, 31,388.16 and 9,082.06 is: 13,615.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,937.21 : 31,388.16 = 9,082.06 : x
  2. Step 2: Convert to fraction form
    20,937.21/31,388.16 = 9,082.06/x
  3. Step 3: Cross multiply
    20,937.21x = 31,388.16 × 9,082.06
  4. Step 4: Simplify right side
    20,937.21x = 285,069,284.56
  5. Step 5: Solve for x
    x = 285,069,284.56/20,937.21
  6. Step 6: Final answer
    x = 13,615.44

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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.