Home / 21,861.90-30,149.62-14,305.82

Finding the Fourth Proportional to 21,861.90, 30,149.62 and 14,305.82

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Solution

The fourth proportional to 21,861.90, 30,149.62 and 14,305.82 is: 19,729.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,861.90 : 30,149.62 = 14,305.82 : x
  2. Step 2: Convert to fraction form
    21,861.90/30,149.62 = 14,305.82/x
  3. Step 3: Cross multiply
    21,861.90x = 30,149.62 × 14,305.82
  4. Step 4: Simplify right side
    21,861.90x = 431,314,850.28
  5. Step 5: Solve for x
    x = 431,314,850.28/21,861.90
  6. Step 6: Final answer
    x = 19,729.07

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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.