Home / 21,082.95-29,107.89-13,136.85

Finding the Fourth Proportional to 21,082.95, 29,107.89 and 13,136.85

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Solution

The fourth proportional to 21,082.95, 29,107.89 and 13,136.85 is: 18,137.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,082.95 : 29,107.89 = 13,136.85 : x
  2. Step 2: Convert to fraction form
    21,082.95/29,107.89 = 13,136.85/x
  3. Step 3: Cross multiply
    21,082.95x = 29,107.89 × 13,136.85
  4. Step 4: Simplify right side
    21,082.95x = 382,385,984.75
  5. Step 5: Solve for x
    x = 382,385,984.75/21,082.95
  6. Step 6: Final answer
    x = 18,137.21

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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.