Home / 21,832.88-30,129.20-12,401.24

Finding the Fourth Proportional to 21,832.88, 30,129.20 and 12,401.24

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Solution

The fourth proportional to 21,832.88, 30,129.20 and 12,401.24 is: 17,113.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,832.88 : 30,129.20 = 12,401.24 : x
  2. Step 2: Convert to fraction form
    21,832.88/30,129.20 = 12,401.24/x
  3. Step 3: Cross multiply
    21,832.88x = 30,129.20 × 12,401.24
  4. Step 4: Simplify right side
    21,832.88x = 373,639,440.21
  5. Step 5: Solve for x
    x = 373,639,440.21/21,832.88
  6. Step 6: Final answer
    x = 17,113.61

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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.