Home / 21,981.47-30,334.37-11,910.15

Finding the Fourth Proportional to 21,981.47, 30,334.37 and 11,910.15

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Solution

The fourth proportional to 21,981.47, 30,334.37 and 11,910.15 is: 16,435.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,981.47 : 30,334.37 = 11,910.15 : x
  2. Step 2: Convert to fraction form
    21,981.47/30,334.37 = 11,910.15/x
  3. Step 3: Cross multiply
    21,981.47x = 30,334.37 × 11,910.15
  4. Step 4: Simplify right side
    21,981.47x = 361,286,837.30
  5. Step 5: Solve for x
    x = 361,286,837.30/21,981.47
  6. Step 6: Final answer
    x = 16,435.98

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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.