Home / 20,674.16-28,530.20-11,242.72

Finding the Fourth Proportional to 20,674.16, 28,530.20 and 11,242.72

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Solution

The fourth proportional to 20,674.16, 28,530.20 and 11,242.72 is: 15,514.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,674.16 : 28,530.20 = 11,242.72 : x
  2. Step 2: Convert to fraction form
    20,674.16/28,530.20 = 11,242.72/x
  3. Step 3: Cross multiply
    20,674.16x = 28,530.20 × 11,242.72
  4. Step 4: Simplify right side
    20,674.16x = 320,757,050.14
  5. Step 5: Solve for x
    x = 320,757,050.14/20,674.16
  6. Step 6: Final answer
    x = 15,514.88

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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.