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Finding the Fourth Proportional to 18,982.78, 28,477.63 and 9,500.05

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Solution

The fourth proportional to 18,982.78, 28,477.63 and 9,500.05 is: 14,251.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,982.78 : 28,477.63 = 9,500.05 : x
  2. Step 2: Convert to fraction form
    18,982.78/28,477.63 = 9,500.05/x
  3. Step 3: Cross multiply
    18,982.78x = 28,477.63 × 9,500.05
  4. Step 4: Simplify right side
    18,982.78x = 270,538,782.78
  5. Step 5: Solve for x
    x = 270,538,782.78/18,982.78
  6. Step 6: Final answer
    x = 14,251.80

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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.