Home / 15,412.20-21,249.56-12,863.63

Finding the Fourth Proportional to 15,412.20, 21,249.56 and 12,863.63

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Solution

The fourth proportional to 15,412.20, 21,249.56 and 12,863.63 is: 17,735.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,412.20 : 21,249.56 = 12,863.63 : x
  2. Step 2: Convert to fraction form
    15,412.20/21,249.56 = 12,863.63/x
  3. Step 3: Cross multiply
    15,412.20x = 21,249.56 × 12,863.63
  4. Step 4: Simplify right side
    15,412.20x = 273,346,306.94
  5. Step 5: Solve for x
    x = 273,346,306.94/15,412.20
  6. Step 6: Final answer
    x = 17,735.71

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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.