Home / 20,662.72-28,514.64-12,279.04

Finding the Fourth Proportional to 20,662.72, 28,514.64 and 12,279.04

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Solution

The fourth proportional to 20,662.72, 28,514.64 and 12,279.04 is: 16,945.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,662.72 : 28,514.64 = 12,279.04 : x
  2. Step 2: Convert to fraction form
    20,662.72/28,514.64 = 12,279.04/x
  3. Step 3: Cross multiply
    20,662.72x = 28,514.64 × 12,279.04
  4. Step 4: Simplify right side
    20,662.72x = 350,132,405.15
  5. Step 5: Solve for x
    x = 350,132,405.15/20,662.72
  6. Step 6: Final answer
    x = 16,945.13

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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.