Home / 21,067.20-31,595.04-7,918.56

Finding the Fourth Proportional to 21,067.20, 31,595.04 and 7,918.56

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Solution

The fourth proportional to 21,067.20, 31,595.04 and 7,918.56 is: 11,875.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,067.20 : 31,595.04 = 7,918.56 : x
  2. Step 2: Convert to fraction form
    21,067.20/31,595.04 = 7,918.56/x
  3. Step 3: Cross multiply
    21,067.20x = 31,595.04 × 7,918.56
  4. Step 4: Simplify right side
    21,067.20x = 250,187,219.94
  5. Step 5: Solve for x
    x = 250,187,219.94/21,067.20
  6. Step 6: Final answer
    x = 11,875.67

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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.