Home / 20,966.03-31,451.09-7,815.32

Finding the Fourth Proportional to 20,966.03, 31,451.09 and 7,815.32

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Solution

The fourth proportional to 20,966.03, 31,451.09 and 7,815.32 is: 11,723.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,966.03 : 31,451.09 = 7,815.32 : x
  2. Step 2: Convert to fraction form
    20,966.03/31,451.09 = 7,815.32/x
  3. Step 3: Cross multiply
    20,966.03x = 31,451.09 × 7,815.32
  4. Step 4: Simplify right side
    20,966.03x = 245,800,372.25
  5. Step 5: Solve for x
    x = 245,800,372.25/20,966.03
  6. Step 6: Final answer
    x = 11,723.74

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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.