Home / 20,687.15-31,011.48-7,536.53

Finding the Fourth Proportional to 20,687.15, 31,011.48 and 7,536.53

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Solution

The fourth proportional to 20,687.15, 31,011.48 and 7,536.53 is: 11,297.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,687.15 : 31,011.48 = 7,536.53 : x
  2. Step 2: Convert to fraction form
    20,687.15/31,011.48 = 7,536.53/x
  3. Step 3: Cross multiply
    20,687.15x = 31,011.48 × 7,536.53
  4. Step 4: Simplify right side
    20,687.15x = 233,718,794.31
  5. Step 5: Solve for x
    x = 233,718,794.31/20,687.15
  6. Step 6: Final answer
    x = 11,297.78

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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.