Home / 20,668.10-28,528.38-12,169.53

Finding the Fourth Proportional to 20,668.10, 28,528.38 and 12,169.53

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Solution

The fourth proportional to 20,668.10, 28,528.38 and 12,169.53 is: 16,797.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,668.10 : 28,528.38 = 12,169.53 : x
  2. Step 2: Convert to fraction form
    20,668.10/28,528.38 = 12,169.53/x
  3. Step 3: Cross multiply
    20,668.10x = 28,528.38 × 12,169.53
  4. Step 4: Simplify right side
    20,668.10x = 347,176,976.26
  5. Step 5: Solve for x
    x = 347,176,976.26/20,668.10
  6. Step 6: Final answer
    x = 16,797.73

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1.5x scale

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.