Home / 20,613.09-28,442.80-12,122.49

Finding the Fourth Proportional to 20,613.09, 28,442.80 and 12,122.49

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Solution

The fourth proportional to 20,613.09, 28,442.80 and 12,122.49 is: 16,727.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,613.09 : 28,442.80 = 12,122.49 : x
  2. Step 2: Convert to fraction form
    20,613.09/28,442.80 = 12,122.49/x
  3. Step 3: Cross multiply
    20,613.09x = 28,442.80 × 12,122.49
  4. Step 4: Simplify right side
    20,613.09x = 344,797,558.57
  5. Step 5: Solve for x
    x = 344,797,558.57/20,613.09
  6. Step 6: Final answer
    x = 16,727.12

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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.