Home / 21,861.80-30,173.77-13,902.49

Finding the Fourth Proportional to 21,861.80, 30,173.77 and 13,902.49

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Solution

The fourth proportional to 21,861.80, 30,173.77 and 13,902.49 is: 19,188.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,861.80 : 30,173.77 = 13,902.49 : x
  2. Step 2: Convert to fraction form
    21,861.80/30,173.77 = 13,902.49/x
  3. Step 3: Cross multiply
    21,861.80x = 30,173.77 × 13,902.49
  4. Step 4: Simplify right side
    21,861.80x = 419,490,342.85
  5. Step 5: Solve for x
    x = 419,490,342.85/21,861.80
  6. Step 6: Final answer
    x = 19,188.28

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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.