Home / 20,712.20-31,072.98-7,564.64

Finding the Fourth Proportional to 20,712.20, 31,072.98 and 7,564.64

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Solution

The fourth proportional to 20,712.20, 31,072.98 and 7,564.64 is: 11,348.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,712.20 : 31,072.98 = 7,564.64 : x
  2. Step 2: Convert to fraction form
    20,712.20/31,072.98 = 7,564.64/x
  3. Step 3: Cross multiply
    20,712.20x = 31,072.98 × 7,564.64
  4. Step 4: Simplify right side
    20,712.20x = 235,055,907.43
  5. Step 5: Solve for x
    x = 235,055,907.43/20,712.20
  6. Step 6: Final answer
    x = 11,348.67

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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.