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Finding the Fourth Proportional to 43,806.40, 65,702.41 and 12,218.61

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Solution

The fourth proportional to 43,806.40, 65,702.41 and 12,218.61 is: 18,325.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,806.40 : 65,702.41 = 12,218.61 : x
  2. Step 2: Convert to fraction form
    43,806.40/65,702.41 = 12,218.61/x
  3. Step 3: Cross multiply
    43,806.40x = 65,702.41 × 12,218.61
  4. Step 4: Simplify right side
    43,806.40x = 802,792,123.85
  5. Step 5: Solve for x
    x = 802,792,123.85/43,806.40
  6. Step 6: Final answer
    x = 18,325.91

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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.