Home / 21,919.58-30,240.68-13,414.86

Finding the Fourth Proportional to 21,919.58, 30,240.68 and 13,414.86

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Solution

The fourth proportional to 21,919.58, 30,240.68 and 13,414.86 is: 18,507.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,919.58 : 30,240.68 = 13,414.86 : x
  2. Step 2: Convert to fraction form
    21,919.58/30,240.68 = 13,414.86/x
  3. Step 3: Cross multiply
    21,919.58x = 30,240.68 × 13,414.86
  4. Step 4: Simplify right side
    21,919.58x = 405,674,488.50
  5. Step 5: Solve for x
    x = 405,674,488.50/21,919.58
  6. Step 6: Final answer
    x = 18,507.40

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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.