Home / 20,668.14-31,002.18-5,085.75

Finding the Fourth Proportional to 20,668.14, 31,002.18 and 5,085.75

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Solution

The fourth proportional to 20,668.14, 31,002.18 and 5,085.75 is: 7,628.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,668.14 : 31,002.18 = 5,085.75 : x
  2. Step 2: Convert to fraction form
    20,668.14/31,002.18 = 5,085.75/x
  3. Step 3: Cross multiply
    20,668.14x = 31,002.18 × 5,085.75
  4. Step 4: Simplify right side
    20,668.14x = 157,669,336.94
  5. Step 5: Solve for x
    x = 157,669,336.94/20,668.14
  6. Step 6: Final answer
    x = 7,628.62

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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.