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Finding the Fourth Proportional to 18,728.42, 28,048.44 and 9,822.48

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Solution

The fourth proportional to 18,728.42, 28,048.44 and 9,822.48 is: 14,710.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,728.42 : 28,048.44 = 9,822.48 : x
  2. Step 2: Convert to fraction form
    18,728.42/28,048.44 = 9,822.48/x
  3. Step 3: Cross multiply
    18,728.42x = 28,048.44 × 9,822.48
  4. Step 4: Simplify right side
    18,728.42x = 275,505,240.93
  5. Step 5: Solve for x
    x = 275,505,240.93/18,728.42
  6. Step 6: Final answer
    x = 14,710.54

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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.