Home / 21,074.55-29,082.85-12,121.82

Finding the Fourth Proportional to 21,074.55, 29,082.85 and 12,121.82

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Solution

The fourth proportional to 21,074.55, 29,082.85 and 12,121.82 is: 16,728.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,074.55 : 29,082.85 = 12,121.82 : x
  2. Step 2: Convert to fraction form
    21,074.55/29,082.85 = 12,121.82/x
  3. Step 3: Cross multiply
    21,074.55x = 29,082.85 × 12,121.82
  4. Step 4: Simplify right side
    21,074.55x = 352,537,072.79
  5. Step 5: Solve for x
    x = 352,537,072.79/21,074.55
  6. Step 6: Final answer
    x = 16,728.09

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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.