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Finding the Fourth Proportional to 46,661.71, 69,978.21 and 13,372.85

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Solution

The fourth proportional to 46,661.71, 69,978.21 and 13,372.85 is: 20,055.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    46,661.71 : 69,978.21 = 13,372.85 : x
  2. Step 2: Convert to fraction form
    46,661.71/69,978.21 = 13,372.85/x
  3. Step 3: Cross multiply
    46,661.71x = 69,978.21 × 13,372.85
  4. Step 4: Simplify right side
    46,661.71x = 935,808,105.60
  5. Step 5: Solve for x
    x = 935,808,105.60/46,661.71
  6. Step 6: Final answer
    x = 20,055.16

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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.