Home / 21,136.42-29,166.24-12,636.85

Finding the Fourth Proportional to 21,136.42, 29,166.24 and 12,636.85

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Solution

The fourth proportional to 21,136.42, 29,166.24 and 12,636.85 is: 17,437.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,136.42 : 29,166.24 = 12,636.85 : x
  2. Step 2: Convert to fraction form
    21,136.42/29,166.24 = 12,636.85/x
  3. Step 3: Cross multiply
    21,136.42x = 29,166.24 × 12,636.85
  4. Step 4: Simplify right side
    21,136.42x = 368,569,399.94
  5. Step 5: Solve for x
    x = 368,569,399.94/21,136.42
  6. Step 6: Final answer
    x = 17,437.65

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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.