Home / 20,939.65-28,896.20-11,986.58

Finding the Fourth Proportional to 20,939.65, 28,896.20 and 11,986.58

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Solution

The fourth proportional to 20,939.65, 28,896.20 and 11,986.58 is: 16,541.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,939.65 : 28,896.20 = 11,986.58 : x
  2. Step 2: Convert to fraction form
    20,939.65/28,896.20 = 11,986.58/x
  3. Step 3: Cross multiply
    20,939.65x = 28,896.20 × 11,986.58
  4. Step 4: Simplify right side
    20,939.65x = 346,366,613.00
  5. Step 5: Solve for x
    x = 346,366,613.00/20,939.65
  6. Step 6: Final answer
    x = 16,541.18

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.