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Finding the Fourth Proportional to 18,705.50, 28,040.94 and 9,819.02

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Solution

The fourth proportional to 18,705.50, 28,040.94 and 9,819.02 is: 14,719.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,705.50 : 28,040.94 = 9,819.02 : x
  2. Step 2: Convert to fraction form
    18,705.50/28,040.94 = 9,819.02/x
  3. Step 3: Cross multiply
    18,705.50x = 28,040.94 × 9,819.02
  4. Step 4: Simplify right side
    18,705.50x = 275,334,550.68
  5. Step 5: Solve for x
    x = 275,334,550.68/18,705.50
  6. Step 6: Final answer
    x = 14,719.44

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1.5x scale

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.