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Finding the Fourth Proportional to 21,235.88, 29,305.88 and 11,676.16

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Solution

The fourth proportional to 21,235.88, 29,305.88 and 11,676.16 is: 16,113.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,235.88 : 29,305.88 = 11,676.16 : x
  2. Step 2: Convert to fraction form
    21,235.88/29,305.88 = 11,676.16/x
  3. Step 3: Cross multiply
    21,235.88x = 29,305.88 × 11,676.16
  4. Step 4: Simplify right side
    21,235.88x = 342,180,143.82
  5. Step 5: Solve for x
    x = 342,180,143.82/21,235.88
  6. Step 6: Final answer
    x = 16,113.30

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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.