Home / 20,682.24-31,008.96-10,662.72

Finding the Fourth Proportional to 20,682.24, 31,008.96 and 10,662.72

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Solution

The fourth proportional to 20,682.24, 31,008.96 and 10,662.72 is: 15,986.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,682.24 : 31,008.96 = 10,662.72 : x
  2. Step 2: Convert to fraction form
    20,682.24/31,008.96 = 10,662.72/x
  3. Step 3: Cross multiply
    20,682.24x = 31,008.96 × 10,662.72
  4. Step 4: Simplify right side
    20,682.24x = 330,639,857.97
  5. Step 5: Solve for x
    x = 330,639,857.97/20,682.24
  6. Step 6: Final answer
    x = 15,986.66

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1.5x scale

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.