Home / 21,168.32-29,211.20-11,738.40

Finding the Fourth Proportional to 21,168.32, 29,211.20 and 11,738.40

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Solution

The fourth proportional to 21,168.32, 29,211.20 and 11,738.40 is: 16,198.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,168.32 : 29,211.20 = 11,738.40 : x
  2. Step 2: Convert to fraction form
    21,168.32/29,211.20 = 11,738.40/x
  3. Step 3: Cross multiply
    21,168.32x = 29,211.20 × 11,738.40
  4. Step 4: Simplify right side
    21,168.32x = 342,892,750.08
  5. Step 5: Solve for x
    x = 342,892,750.08/21,168.32
  6. Step 6: Final answer
    x = 16,198.39

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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.