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Finding the Fourth Proportional to 18,724.50, 28,086.81 and 4,873.50

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Solution

The fourth proportional to 18,724.50, 28,086.81 and 4,873.50 is: 7,310.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,724.50 : 28,086.81 = 4,873.50 : x
  2. Step 2: Convert to fraction form
    18,724.50/28,086.81 = 4,873.50/x
  3. Step 3: Cross multiply
    18,724.50x = 28,086.81 × 4,873.50
  4. Step 4: Simplify right side
    18,724.50x = 136,881,068.54
  5. Step 5: Solve for x
    x = 136,881,068.54/18,724.50
  6. Step 6: Final answer
    x = 7,310.27

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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.