Home / 21,145.12-29,180.18-12,192.59

Finding the Fourth Proportional to 21,145.12, 29,180.18 and 12,192.59

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Solution

The fourth proportional to 21,145.12, 29,180.18 and 12,192.59 is: 16,825.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,145.12 : 29,180.18 = 12,192.59 : x
  2. Step 2: Convert to fraction form
    21,145.12/29,180.18 = 12,192.59/x
  3. Step 3: Cross multiply
    21,145.12x = 29,180.18 × 12,192.59
  4. Step 4: Simplify right side
    21,145.12x = 355,782,074.30
  5. Step 5: Solve for x
    x = 355,782,074.30/21,145.12
  6. Step 6: Final answer
    x = 16,825.73

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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.