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Finding the Fourth Proportional to 21,057.92, 29,060.67 and 12,103.83

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Solution

The fourth proportional to 21,057.92, 29,060.67 and 12,103.83 is: 16,703.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,057.92 : 29,060.67 = 12,103.83 : x
  2. Step 2: Convert to fraction form
    21,057.92/29,060.67 = 12,103.83/x
  3. Step 3: Cross multiply
    21,057.92x = 29,060.67 × 12,103.83
  4. Step 4: Simplify right side
    21,057.92x = 351,745,454.76
  5. Step 5: Solve for x
    x = 351,745,454.76/21,057.92
  6. Step 6: Final answer
    x = 16,703.71

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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.