Home / 21,137.55-29,169.05-12,185.43

Finding the Fourth Proportional to 21,137.55, 29,169.05 and 12,185.43

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Solution

The fourth proportional to 21,137.55, 29,169.05 and 12,185.43 is: 16,815.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,137.55 : 29,169.05 = 12,185.43 : x
  2. Step 2: Convert to fraction form
    21,137.55/29,169.05 = 12,185.43/x
  3. Step 3: Cross multiply
    21,137.55x = 29,169.05 × 12,185.43
  4. Step 4: Simplify right side
    21,137.55x = 355,437,356.01
  5. Step 5: Solve for x
    x = 355,437,356.01/21,137.55
  6. Step 6: Final answer
    x = 16,815.45

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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.