Home / 21,911.67-30,237.84-12,480.21

Finding the Fourth Proportional to 21,911.67, 30,237.84 and 12,480.21

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Solution

The fourth proportional to 21,911.67, 30,237.84 and 12,480.21 is: 17,222.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,911.67 : 30,237.84 = 12,480.21 : x
  2. Step 2: Convert to fraction form
    21,911.67/30,237.84 = 12,480.21/x
  3. Step 3: Cross multiply
    21,911.67x = 30,237.84 × 12,480.21
  4. Step 4: Simplify right side
    21,911.67x = 377,374,593.15
  5. Step 5: Solve for x
    x = 377,374,593.15/21,911.67
  6. Step 6: Final answer
    x = 17,222.54

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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.