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Finding the Fourth Proportional to 21,076.92, 29,082.87 and 12,124.80

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Solution

The fourth proportional to 21,076.92, 29,082.87 and 12,124.80 is: 16,730.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,076.92 : 29,082.87 = 12,124.80 : x
  2. Step 2: Convert to fraction form
    21,076.92/29,082.87 = 12,124.80/x
  3. Step 3: Cross multiply
    21,076.92x = 29,082.87 × 12,124.80
  4. Step 4: Simplify right side
    21,076.92x = 352,623,982.18
  5. Step 5: Solve for x
    x = 352,623,982.18/21,076.92
  6. Step 6: Final answer
    x = 16,730.34

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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.