Home / 20,679.80-31,035.35-15,147.53

Finding the Fourth Proportional to 20,679.80, 31,035.35 and 15,147.53

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Solution

The fourth proportional to 20,679.80, 31,035.35 and 15,147.53 is: 22,732.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,679.80 : 31,035.35 = 15,147.53 : x
  2. Step 2: Convert to fraction form
    20,679.80/31,035.35 = 15,147.53/x
  3. Step 3: Cross multiply
    20,679.80x = 31,035.35 × 15,147.53
  4. Step 4: Simplify right side
    20,679.80x = 470,108,664.27
  5. Step 5: Solve for x
    x = 470,108,664.27/20,679.80
  6. Step 6: Final answer
    x = 22,732.75

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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.