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Finding the Fourth Proportional to 28,936.61, 43,408.03 and 9,210.56

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Solution

The fourth proportional to 28,936.61, 43,408.03 and 9,210.56 is: 13,816.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,936.61 : 43,408.03 = 9,210.56 : x
  2. Step 2: Convert to fraction form
    28,936.61/43,408.03 = 9,210.56/x
  3. Step 3: Cross multiply
    28,936.61x = 43,408.03 × 9,210.56
  4. Step 4: Simplify right side
    28,936.61x = 399,812,059.27
  5. Step 5: Solve for x
    x = 399,812,059.27/28,936.61
  6. Step 6: Final answer
    x = 13,816.82

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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.