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Finding the Fourth Proportional to 31,792.80, 47,674.80 and 12,064.80

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Solution

The fourth proportional to 31,792.80, 47,674.80 and 12,064.80 is: 18,091.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,792.80 : 47,674.80 = 12,064.80 : x
  2. Step 2: Convert to fraction form
    31,792.80/47,674.80 = 12,064.80/x
  3. Step 3: Cross multiply
    31,792.80x = 47,674.80 × 12,064.80
  4. Step 4: Simplify right side
    31,792.80x = 575,186,927.04
  5. Step 5: Solve for x
    x = 575,186,927.04/31,792.80
  6. Step 6: Final answer
    x = 18,091.74

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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.