Home / 21,918.10-30,249.24-13,425.86

Finding the Fourth Proportional to 21,918.10, 30,249.24 and 13,425.86

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Solution

The fourth proportional to 21,918.10, 30,249.24 and 13,425.86 is: 18,529.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,918.10 : 30,249.24 = 13,425.86 : x
  2. Step 2: Convert to fraction form
    21,918.10/30,249.24 = 13,425.86/x
  3. Step 3: Cross multiply
    21,918.10x = 30,249.24 × 13,425.86
  4. Step 4: Simplify right side
    21,918.10x = 406,122,061.35
  5. Step 5: Solve for x
    x = 406,122,061.35/21,918.10
  6. Step 6: Final answer
    x = 18,529.07

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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.