Home / 21,827.86-30,121.66-13,344.20

Finding the Fourth Proportional to 21,827.86, 30,121.66 and 13,344.20

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Solution

The fourth proportional to 21,827.86, 30,121.66 and 13,344.20 is: 18,414.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,827.86 : 30,121.66 = 13,344.20 : x
  2. Step 2: Convert to fraction form
    21,827.86/30,121.66 = 13,344.20/x
  3. Step 3: Cross multiply
    21,827.86x = 30,121.66 × 13,344.20
  4. Step 4: Simplify right side
    21,827.86x = 401,949,455.37
  5. Step 5: Solve for x
    x = 401,949,455.37/21,827.86
  6. Step 6: Final answer
    x = 18,414.51

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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.