Home / 21,157.20-29,195.64-11,725.56

Finding the Fourth Proportional to 21,157.20, 29,195.64 and 11,725.56

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Solution

The fourth proportional to 21,157.20, 29,195.64 and 11,725.56 is: 16,180.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,157.20 : 29,195.64 = 11,725.56 : x
  2. Step 2: Convert to fraction form
    21,157.20/29,195.64 = 11,725.56/x
  3. Step 3: Cross multiply
    21,157.20x = 29,195.64 × 11,725.56
  4. Step 4: Simplify right side
    21,157.20x = 342,335,228.56
  5. Step 5: Solve for x
    x = 342,335,228.56/21,157.20
  6. Step 6: Final answer
    x = 16,180.55

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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.