Home / 21,832.36-30,129.56-12,401.80

Finding the Fourth Proportional to 21,832.36, 30,129.56 and 12,401.80

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Solution

The fourth proportional to 21,832.36, 30,129.56 and 12,401.80 is: 17,115.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,832.36 : 30,129.56 = 12,401.80 : x
  2. Step 2: Convert to fraction form
    21,832.36/30,129.56 = 12,401.80/x
  3. Step 3: Cross multiply
    21,832.36x = 30,129.56 × 12,401.80
  4. Step 4: Simplify right side
    21,832.36x = 373,660,777.21
  5. Step 5: Solve for x
    x = 373,660,777.21/21,832.36
  6. Step 6: Final answer
    x = 17,115.00

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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.