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Finding the Fourth Proportional to 21,196.50, 31,795.36 and 5,614.13

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Solution

The fourth proportional to 21,196.50, 31,795.36 and 5,614.13 is: 8,421.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,196.50 : 31,795.36 = 5,614.13 : x
  2. Step 2: Convert to fraction form
    21,196.50/31,795.36 = 5,614.13/x
  3. Step 3: Cross multiply
    21,196.50x = 31,795.36 × 5,614.13
  4. Step 4: Simplify right side
    21,196.50x = 178,503,111.42
  5. Step 5: Solve for x
    x = 178,503,111.42/21,196.50
  6. Step 6: Final answer
    x = 8,421.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.