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Finding the Fourth Proportional to 21,874.10, 32,810.88 and 7,082.66

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Solution

The fourth proportional to 21,874.10, 32,810.88 and 7,082.66 is: 10,623.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,874.10 : 32,810.88 = 7,082.66 : x
  2. Step 2: Convert to fraction form
    21,874.10/32,810.88 = 7,082.66/x
  3. Step 3: Cross multiply
    21,874.10x = 32,810.88 × 7,082.66
  4. Step 4: Simplify right side
    21,874.10x = 232,388,307.34
  5. Step 5: Solve for x
    x = 232,388,307.34/21,874.10
  6. Step 6: Final answer
    x = 10,623.90

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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.