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Finding the Fourth Proportional to 21,235.44, 29,305.80 and 11,803.44

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Solution

The fourth proportional to 21,235.44, 29,305.80 and 11,803.44 is: 16,289.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,235.44 : 29,305.80 = 11,803.44 : x
  2. Step 2: Convert to fraction form
    21,235.44/29,305.80 = 11,803.44/x
  3. Step 3: Cross multiply
    21,235.44x = 29,305.80 × 11,803.44
  4. Step 4: Simplify right side
    21,235.44x = 345,909,251.95
  5. Step 5: Solve for x
    x = 345,909,251.95/21,235.44
  6. Step 6: Final answer
    x = 16,289.24

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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.