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Finding the Fourth Proportional to 19,607.78, 29,413.84 and 7,131.62

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Solution

The fourth proportional to 19,607.78, 29,413.84 and 7,131.62 is: 10,698.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,607.78 : 29,413.84 = 7,131.62 : x
  2. Step 2: Convert to fraction form
    19,607.78/29,413.84 = 7,131.62/x
  3. Step 3: Cross multiply
    19,607.78x = 29,413.84 × 7,131.62
  4. Step 4: Simplify right side
    19,607.78x = 209,768,329.62
  5. Step 5: Solve for x
    x = 209,768,329.62/19,607.78
  6. Step 6: Final answer
    x = 10,698.22

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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.