Home / 21,961.86-30,321.33-14,421.57

Finding the Fourth Proportional to 21,961.86, 30,321.33 and 14,421.57

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Solution

The fourth proportional to 21,961.86, 30,321.33 and 14,421.57 is: 19,910.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,961.86 : 30,321.33 = 14,421.57 : x
  2. Step 2: Convert to fraction form
    21,961.86/30,321.33 = 14,421.57/x
  3. Step 3: Cross multiply
    21,961.86x = 30,321.33 × 14,421.57
  4. Step 4: Simplify right side
    21,961.86x = 437,281,183.09
  5. Step 5: Solve for x
    x = 437,281,183.09/21,961.86
  6. Step 6: Final answer
    x = 19,910.94

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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.