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Finding the Fourth Proportional to 21,500.70, 29,672.83 and 12,551.09

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Solution

The fourth proportional to 21,500.70, 29,672.83 and 12,551.09 is: 17,321.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,500.70 : 29,672.83 = 12,551.09 : x
  2. Step 2: Convert to fraction form
    21,500.70/29,672.83 = 12,551.09/x
  3. Step 3: Cross multiply
    21,500.70x = 29,672.83 × 12,551.09
  4. Step 4: Simplify right side
    21,500.70x = 372,426,227.21
  5. Step 5: Solve for x
    x = 372,426,227.21/21,500.70
  6. Step 6: Final answer
    x = 17,321.59

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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.