Home / 20,489,372.40-30,713,063.40-11,965,321.20

Finding the Fourth Proportional to 20,489,372.40, 30,713,063.40 and 11,965,321.20

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Solution

The fourth proportional to 20,489,372.40, 30,713,063.40 and 11,965,321.20 is: 17,935,721.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,489,372.40 : 30,713,063.40 = 11,965,321.20 : x
  2. Step 2: Convert to fraction form
    20,489,372.40/30,713,063.40 = 11,965,321.20/x
  3. Step 3: Cross multiply
    20,489,372.40x = 30,713,063.40 × 11,965,321.20
  4. Step 4: Simplify right side
    20,489,372.40x = 367,491,668,616,964.06
  5. Step 5: Solve for x
    x = 367,491,668,616,964.06/20,489,372.40
  6. Step 6: Final answer
    x = 17,935,721.09

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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.