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Finding the Fourth Proportional to 48,405.87, 72,580.62 and 18,789.11

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Solution

The fourth proportional to 48,405.87, 72,580.62 and 18,789.11 is: 28,172.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,405.87 : 72,580.62 = 18,789.11 : x
  2. Step 2: Convert to fraction form
    48,405.87/72,580.62 = 18,789.11/x
  3. Step 3: Cross multiply
    48,405.87x = 72,580.62 × 18,789.11
  4. Step 4: Simplify right side
    48,405.87x = 1,363,725,253.05
  5. Step 5: Solve for x
    x = 1,363,725,253.05/48,405.87
  6. Step 6: Final answer
    x = 28,172.72

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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.