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Finding the Fourth Proportional to 20,393.78, 30,584.79 and 5,603.18

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Solution

The fourth proportional to 20,393.78, 30,584.79 and 5,603.18 is: 8,403.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,393.78 : 30,584.79 = 5,603.18 : x
  2. Step 2: Convert to fraction form
    20,393.78/30,584.79 = 5,603.18/x
  3. Step 3: Cross multiply
    20,393.78x = 30,584.79 × 5,603.18
  4. Step 4: Simplify right side
    20,393.78x = 171,372,083.63
  5. Step 5: Solve for x
    x = 171,372,083.63/20,393.78
  6. Step 6: Final answer
    x = 8,403.15

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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.