Home / 21,601.08-29,791.86-18,138.30

Finding the Fourth Proportional to 21,601.08, 29,791.86 and 18,138.30

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Solution

The fourth proportional to 21,601.08, 29,791.86 and 18,138.30 is: 25,016.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,601.08 : 29,791.86 = 18,138.30 : x
  2. Step 2: Convert to fraction form
    21,601.08/29,791.86 = 18,138.30/x
  3. Step 3: Cross multiply
    21,601.08x = 29,791.86 × 18,138.30
  4. Step 4: Simplify right side
    21,601.08x = 540,373,694.24
  5. Step 5: Solve for x
    x = 540,373,694.24/21,601.08
  6. Step 6: Final answer
    x = 25,016.05

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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.