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Finding the Fourth Proportional to 20,398.62, 30,598.68 and 5,608.70

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Solution

The fourth proportional to 20,398.62, 30,598.68 and 5,608.70 is: 8,413.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,398.62 : 30,598.68 = 5,608.70 : x
  2. Step 2: Convert to fraction form
    20,398.62/30,598.68 = 5,608.70/x
  3. Step 3: Cross multiply
    20,398.62x = 30,598.68 × 5,608.70
  4. Step 4: Simplify right side
    20,398.62x = 171,618,663.52
  5. Step 5: Solve for x
    x = 171,618,663.52/20,398.62
  6. Step 6: Final answer
    x = 8,413.25

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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.