Home / 21,850.35-30,153.43-12,418.91

Finding the Fourth Proportional to 21,850.35, 30,153.43 and 12,418.91

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Solution

The fourth proportional to 21,850.35, 30,153.43 and 12,418.91 is: 17,138.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,850.35 : 30,153.43 = 12,418.91 : x
  2. Step 2: Convert to fraction form
    21,850.35/30,153.43 = 12,418.91/x
  3. Step 3: Cross multiply
    21,850.35x = 30,153.43 × 12,418.91
  4. Step 4: Simplify right side
    21,850.35x = 374,472,733.36
  5. Step 5: Solve for x
    x = 374,472,733.36/21,850.35
  6. Step 6: Final answer
    x = 17,138.07

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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.