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Finding the Fourth Proportional to 28,704.11, 43,057.99 and 7,643.81

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Solution

The fourth proportional to 28,704.11, 43,057.99 and 7,643.81 is: 11,466.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,704.11 : 43,057.99 = 7,643.81 : x
  2. Step 2: Convert to fraction form
    28,704.11/43,057.99 = 7,643.81/x
  3. Step 3: Cross multiply
    28,704.11x = 43,057.99 × 7,643.81
  4. Step 4: Simplify right side
    28,704.11x = 329,127,094.54
  5. Step 5: Solve for x
    x = 329,127,094.54/28,704.11
  6. Step 6: Final answer
    x = 11,466.20

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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.