Home / 21,832.78-30,129.26-12,401.34

Finding the Fourth Proportional to 21,832.78, 30,129.26 and 12,401.34

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Solution

The fourth proportional to 21,832.78, 30,129.26 and 12,401.34 is: 17,113.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,832.78 : 30,129.26 = 12,401.34 : x
  2. Step 2: Convert to fraction form
    21,832.78/30,129.26 = 12,401.34/x
  3. Step 3: Cross multiply
    21,832.78x = 30,129.26 × 12,401.34
  4. Step 4: Simplify right side
    21,832.78x = 373,643,197.21
  5. Step 5: Solve for x
    x = 373,643,197.21/21,832.78
  6. Step 6: Final answer
    x = 17,113.86

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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.