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Finding the Fourth Proportional to 28,702.76, 43,028.62 and 11,168.48

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Solution

The fourth proportional to 28,702.76, 43,028.62 and 11,168.48 is: 16,742.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,702.76 : 43,028.62 = 11,168.48 : x
  2. Step 2: Convert to fraction form
    28,702.76/43,028.62 = 11,168.48/x
  3. Step 3: Cross multiply
    28,702.76x = 43,028.62 × 11,168.48
  4. Step 4: Simplify right side
    28,702.76x = 480,564,361.55
  5. Step 5: Solve for x
    x = 480,564,361.55/28,702.76
  6. Step 6: Final answer
    x = 16,742.80

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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.