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Finding the Fourth Proportional to 43,272.85, 64,916.03 and 13,687.87

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Solution

The fourth proportional to 43,272.85, 64,916.03 and 13,687.87 is: 20,533.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,272.85 : 64,916.03 = 13,687.87 : x
  2. Step 2: Convert to fraction form
    43,272.85/64,916.03 = 13,687.87/x
  3. Step 3: Cross multiply
    43,272.85x = 64,916.03 × 13,687.87
  4. Step 4: Simplify right side
    43,272.85x = 888,562,179.56
  5. Step 5: Solve for x
    x = 888,562,179.56/43,272.85
  6. Step 6: Final answer
    x = 20,533.94

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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.