Home / 21,981.17-30,334.91-12,424.79

Finding the Fourth Proportional to 21,981.17, 30,334.91 and 12,424.79

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Solution

The fourth proportional to 21,981.17, 30,334.91 and 12,424.79 is: 17,146.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,981.17 : 30,334.91 = 12,424.79 : x
  2. Step 2: Convert to fraction form
    21,981.17/30,334.91 = 12,424.79/x
  3. Step 3: Cross multiply
    21,981.17x = 30,334.91 × 12,424.79
  4. Step 4: Simplify right side
    21,981.17x = 376,904,900.13
  5. Step 5: Solve for x
    x = 376,904,900.13/21,981.17
  6. Step 6: Final answer
    x = 17,146.71

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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.