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Finding the Fourth Proportional to 21,375.44, 29,498.76 and 11,944.40

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Solution

The fourth proportional to 21,375.44, 29,498.76 and 11,944.40 is: 16,483.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,375.44 : 29,498.76 = 11,944.40 : x
  2. Step 2: Convert to fraction form
    21,375.44/29,498.76 = 11,944.40/x
  3. Step 3: Cross multiply
    21,375.44x = 29,498.76 × 11,944.40
  4. Step 4: Simplify right side
    21,375.44x = 352,344,988.94
  5. Step 5: Solve for x
    x = 352,344,988.94/21,375.44
  6. Step 6: Final answer
    x = 16,483.64

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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.