Home / 13,620.91-20,431.36-4,261.01

Finding the Fourth Proportional to 13,620.91, 20,431.36 and 4,261.01

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Solution

The fourth proportional to 13,620.91, 20,431.36 and 4,261.01 is: 6,391.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,620.91 : 20,431.36 = 4,261.01 : x
  2. Step 2: Convert to fraction form
    13,620.91/20,431.36 = 4,261.01/x
  3. Step 3: Cross multiply
    13,620.91x = 20,431.36 × 4,261.01
  4. Step 4: Simplify right side
    13,620.91x = 87,058,144.43
  5. Step 5: Solve for x
    x = 87,058,144.43/13,620.91
  6. Step 6: Final answer
    x = 6,391.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.