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Finding the Fourth Proportional to 21,622.87, 29,838.88 and 12,676.33

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Solution

The fourth proportional to 21,622.87, 29,838.88 and 12,676.33 is: 17,492.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,622.87 : 29,838.88 = 12,676.33 : x
  2. Step 2: Convert to fraction form
    21,622.87/29,838.88 = 12,676.33/x
  3. Step 3: Cross multiply
    21,622.87x = 29,838.88 × 12,676.33
  4. Step 4: Simplify right side
    21,622.87x = 378,247,383.42
  5. Step 5: Solve for x
    x = 378,247,383.42/21,622.87
  6. Step 6: Final answer
    x = 17,492.93

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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.