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Finding the Fourth Proportional to 39,787.96, 59,689.50 and 11,707.96

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Solution

The fourth proportional to 39,787.96, 59,689.50 and 11,707.96 is: 17,564.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,787.96 : 59,689.50 = 11,707.96 : x
  2. Step 2: Convert to fraction form
    39,787.96/59,689.50 = 11,707.96/x
  3. Step 3: Cross multiply
    39,787.96x = 59,689.50 × 11,707.96
  4. Step 4: Simplify right side
    39,787.96x = 698,842,278.42
  5. Step 5: Solve for x
    x = 698,842,278.42/39,787.96
  6. Step 6: Final answer
    x = 17,564.16

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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.