Home / 20,613.96-28,429.68-15,845.46

Finding the Fourth Proportional to 20,613.96, 28,429.68 and 15,845.46

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Solution

The fourth proportional to 20,613.96, 28,429.68 and 15,845.46 is: 21,853.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,613.96 : 28,429.68 = 15,845.46 : x
  2. Step 2: Convert to fraction form
    20,613.96/28,429.68 = 15,845.46/x
  3. Step 3: Cross multiply
    20,613.96x = 28,429.68 × 15,845.46
  4. Step 4: Simplify right side
    20,613.96x = 450,481,310.06
  5. Step 5: Solve for x
    x = 450,481,310.06/20,613.96
  6. Step 6: Final answer
    x = 21,853.22

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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.