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Finding the Fourth Proportional to 19,963.16, 29,929.70 and 12,063.99

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Solution

The fourth proportional to 19,963.16, 29,929.70 and 12,063.99 is: 18,086.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,963.16 : 29,929.70 = 12,063.99 : x
  2. Step 2: Convert to fraction form
    19,963.16/29,929.70 = 12,063.99/x
  3. Step 3: Cross multiply
    19,963.16x = 29,929.70 × 12,063.99
  4. Step 4: Simplify right side
    19,963.16x = 361,071,541.18
  5. Step 5: Solve for x
    x = 361,071,541.18/19,963.16
  6. Step 6: Final answer
    x = 18,086.90

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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.