Home / 20,613.48-28,450.68-11,661

Finding the Fourth Proportional to 20,613.48, 28,450.68 and 11,661

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Solution

The fourth proportional to 20,613.48, 28,450.68 and 11,661 is: 16,094.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,613.48 : 28,450.68 = 11,661 : x
  2. Step 2: Convert to fraction form
    20,613.48/28,450.68 = 11,661/x
  3. Step 3: Cross multiply
    20,613.48x = 28,450.68 × 11,661
  4. Step 4: Simplify right side
    20,613.48x = 331,763,379.48
  5. Step 5: Solve for x
    x = 331,763,379.48/20,613.48
  6. Step 6: Final answer
    x = 16,094.49

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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.