Home / 21,145.30-29,183.62-12,191.05

Finding the Fourth Proportional to 21,145.30, 29,183.62 and 12,191.05

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Solution

The fourth proportional to 21,145.30, 29,183.62 and 12,191.05 is: 16,825.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,145.30 : 29,183.62 = 12,191.05 : x
  2. Step 2: Convert to fraction form
    21,145.30/29,183.62 = 12,191.05/x
  3. Step 3: Cross multiply
    21,145.30x = 29,183.62 × 12,191.05
  4. Step 4: Simplify right side
    21,145.30x = 355,778,867.16
  5. Step 5: Solve for x
    x = 355,778,867.16/21,145.30
  6. Step 6: Final answer
    x = 16,825.44

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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.