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Finding the Fourth Proportional to 28,868.16, 43,301.64 and 8,091.12

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Solution

The fourth proportional to 28,868.16, 43,301.64 and 8,091.12 is: 12,136.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,868.16 : 43,301.64 = 8,091.12 : x
  2. Step 2: Convert to fraction form
    28,868.16/43,301.64 = 8,091.12/x
  3. Step 3: Cross multiply
    28,868.16x = 43,301.64 × 8,091.12
  4. Step 4: Simplify right side
    28,868.16x = 350,358,765.44
  5. Step 5: Solve for x
    x = 350,358,765.44/28,868.16
  6. Step 6: Final answer
    x = 12,136.51

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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.