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Finding the Fourth Proportional to 28,908.71, 43,369.92 and 9,187.28

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Solution

The fourth proportional to 28,908.71, 43,369.92 and 9,187.28 is: 13,783.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,908.71 : 43,369.92 = 9,187.28 : x
  2. Step 2: Convert to fraction form
    28,908.71/43,369.92 = 9,187.28/x
  3. Step 3: Cross multiply
    28,908.71x = 43,369.92 × 9,187.28
  4. Step 4: Simplify right side
    28,908.71x = 398,451,381.77
  5. Step 5: Solve for x
    x = 398,451,381.77/28,908.71
  6. Step 6: Final answer
    x = 13,783.09

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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.