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Finding the Fourth Proportional to 30,945,413.40, 42,702,169.05 and 17,893,518.90

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Solution

The fourth proportional to 30,945,413.40, 42,702,169.05 and 17,893,518.90 is: 24,691,609.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,945,413.40 : 42,702,169.05 = 17,893,518.90 : x
  2. Step 2: Convert to fraction form
    30,945,413.40/42,702,169.05 = 17,893,518.90/x
  3. Step 3: Cross multiply
    30,945,413.40x = 42,702,169.05 × 17,893,518.90
  4. Step 4: Simplify right side
    30,945,413.40x = 764,092,068,967,169.88
  5. Step 5: Solve for x
    x = 764,092,068,967,169.88/30,945,413.40
  6. Step 6: Final answer
    x = 24,691,609.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.