Home / 20,122.24-30,138-9,715.36

Finding the Fourth Proportional to 20,122.24, 30,138 and 9,715.36

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Solution

The fourth proportional to 20,122.24, 30,138 and 9,715.36 is: 14,551.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,122.24 : 30,138 = 9,715.36 : x
  2. Step 2: Convert to fraction form
    20,122.24/30,138 = 9,715.36/x
  3. Step 3: Cross multiply
    20,122.24x = 30,138 × 9,715.36
  4. Step 4: Simplify right side
    20,122.24x = 292,801,519.68
  5. Step 5: Solve for x
    x = 292,801,519.68/20,122.24
  6. Step 6: Final answer
    x = 14,551.14

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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.