Home / 20,815.34-31,208.41-7,666.03

Finding the Fourth Proportional to 20,815.34, 31,208.41 and 7,666.03

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Solution

The fourth proportional to 20,815.34, 31,208.41 and 7,666.03 is: 11,493.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,815.34 : 31,208.41 = 7,666.03 : x
  2. Step 2: Convert to fraction form
    20,815.34/31,208.41 = 7,666.03/x
  3. Step 3: Cross multiply
    20,815.34x = 31,208.41 × 7,666.03
  4. Step 4: Simplify right side
    20,815.34x = 239,244,607.31
  5. Step 5: Solve for x
    x = 239,244,607.31/20,815.34
  6. Step 6: Final answer
    x = 11,493.67

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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.