Home / 21,981.88-30,334.26-12,422.14

Finding the Fourth Proportional to 21,981.88, 30,334.26 and 12,422.14

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Solution

The fourth proportional to 21,981.88, 30,334.26 and 12,422.14 is: 17,142.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,981.88 : 30,334.26 = 12,422.14 : x
  2. Step 2: Convert to fraction form
    21,981.88/30,334.26 = 12,422.14/x
  3. Step 3: Cross multiply
    21,981.88x = 30,334.26 × 12,422.14
  4. Step 4: Simplify right side
    21,981.88x = 376,816,424.52
  5. Step 5: Solve for x
    x = 376,816,424.52/21,981.88
  6. Step 6: Final answer
    x = 17,142.14

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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.