Home / 21,135.42-29,165.83-12,182.38

Finding the Fourth Proportional to 21,135.42, 29,165.83 and 12,182.38

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Solution

The fourth proportional to 21,135.42, 29,165.83 and 12,182.38 is: 16,811.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,135.42 : 29,165.83 = 12,182.38 : x
  2. Step 2: Convert to fraction form
    21,135.42/29,165.83 = 12,182.38/x
  3. Step 3: Cross multiply
    21,135.42x = 29,165.83 × 12,182.38
  4. Step 4: Simplify right side
    21,135.42x = 355,309,163.16
  5. Step 5: Solve for x
    x = 355,309,163.16/21,135.42
  6. Step 6: Final answer
    x = 16,811.08

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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.