Home / 20,865.99-31,306.68-9,776.28

Finding the Fourth Proportional to 20,865.99, 31,306.68 and 9,776.28

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Solution

The fourth proportional to 20,865.99, 31,306.68 and 9,776.28 is: 14,668.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,865.99 : 31,306.68 = 9,776.28 : x
  2. Step 2: Convert to fraction form
    20,865.99/31,306.68 = 9,776.28/x
  3. Step 3: Cross multiply
    20,865.99x = 31,306.68 × 9,776.28
  4. Step 4: Simplify right side
    20,865.99x = 306,062,869.55
  5. Step 5: Solve for x
    x = 306,062,869.55/20,865.99
  6. Step 6: Final answer
    x = 14,668.03

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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.