Home / 21,961.89-30,307.42-11,890.33

Finding the Fourth Proportional to 21,961.89, 30,307.42 and 11,890.33

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Solution

The fourth proportional to 21,961.89, 30,307.42 and 11,890.33 is: 16,408.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,961.89 : 30,307.42 = 11,890.33 : x
  2. Step 2: Convert to fraction form
    21,961.89/30,307.42 = 11,890.33/x
  3. Step 3: Cross multiply
    21,961.89x = 30,307.42 × 11,890.33
  4. Step 4: Simplify right side
    21,961.89x = 360,365,165.80
  5. Step 5: Solve for x
    x = 360,365,165.80/21,961.89
  6. Step 6: Final answer
    x = 16,408.66

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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.