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Finding the Fourth Proportional to 13,613.92, 20,404.48 and 7,036.56

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Solution

The fourth proportional to 13,613.92, 20,404.48 and 7,036.56 is: 10,546.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,613.92 : 20,404.48 = 7,036.56 : x
  2. Step 2: Convert to fraction form
    13,613.92/20,404.48 = 7,036.56/x
  3. Step 3: Cross multiply
    13,613.92x = 20,404.48 × 7,036.56
  4. Step 4: Simplify right side
    13,613.92x = 143,577,347.79
  5. Step 5: Solve for x
    x = 143,577,347.79/13,613.92
  6. Step 6: Final answer
    x = 10,546.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.