Home / 21,156.85-29,195.40-11,725.21

Finding the Fourth Proportional to 21,156.85, 29,195.40 and 11,725.21

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Solution

The fourth proportional to 21,156.85, 29,195.40 and 11,725.21 is: 16,180.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,156.85 : 29,195.40 = 11,725.21 : x
  2. Step 2: Convert to fraction form
    21,156.85/29,195.40 = 11,725.21/x
  3. Step 3: Cross multiply
    21,156.85x = 29,195.40 × 11,725.21
  4. Step 4: Simplify right side
    21,156.85x = 342,322,196.03
  5. Step 5: Solve for x
    x = 342,322,196.03/21,156.85
  6. Step 6: Final answer
    x = 16,180.21

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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.