Home / 21,981.50-30,334.47-11,910

Finding the Fourth Proportional to 21,981.50, 30,334.47 and 11,910

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Solution

The fourth proportional to 21,981.50, 30,334.47 and 11,910 is: 16,435.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,981.50 : 30,334.47 = 11,910 : x
  2. Step 2: Convert to fraction form
    21,981.50/30,334.47 = 11,910/x
  3. Step 3: Cross multiply
    21,981.50x = 30,334.47 × 11,910
  4. Step 4: Simplify right side
    21,981.50x = 361,283,537.70
  5. Step 5: Solve for x
    x = 361,283,537.70/21,981.50
  6. Step 6: Final answer
    x = 16,435.80

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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.