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Finding the Fourth Proportional to 46,661.65, 69,978.11 and 13,372.79

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Solution

The fourth proportional to 46,661.65, 69,978.11 and 13,372.79 is: 20,055.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    46,661.65 : 69,978.11 = 13,372.79 : x
  2. Step 2: Convert to fraction form
    46,661.65/69,978.11 = 13,372.79/x
  3. Step 3: Cross multiply
    46,661.65x = 69,978.11 × 13,372.79
  4. Step 4: Simplify right side
    46,661.65x = 935,802,152.87
  5. Step 5: Solve for x
    x = 935,802,152.87/46,661.65
  6. Step 6: Final answer
    x = 20,055.06

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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.