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Finding the Fourth Proportional to 31,367.61, 47,060.60 and 12,637.98

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Solution

The fourth proportional to 31,367.61, 47,060.60 and 12,637.98 is: 18,960.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,367.61 : 47,060.60 = 12,637.98 : x
  2. Step 2: Convert to fraction form
    31,367.61/47,060.60 = 12,637.98/x
  3. Step 3: Cross multiply
    31,367.61x = 47,060.60 × 12,637.98
  4. Step 4: Simplify right side
    31,367.61x = 594,750,858.40
  5. Step 5: Solve for x
    x = 594,750,858.40/31,367.61
  6. Step 6: Final answer
    x = 18,960.67

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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.