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Finding the Fourth Proportional to 12,413.70, 18,620.55 and 4,620.90

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Solution

The fourth proportional to 12,413.70, 18,620.55 and 4,620.90 is: 6,931.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,413.70 : 18,620.55 = 4,620.90 : x
  2. Step 2: Convert to fraction form
    12,413.70/18,620.55 = 4,620.90/x
  3. Step 3: Cross multiply
    12,413.70x = 18,620.55 × 4,620.90
  4. Step 4: Simplify right side
    12,413.70x = 86,043,699.50
  5. Step 5: Solve for x
    x = 86,043,699.50/12,413.70
  6. Step 6: Final answer
    x = 6,931.35

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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.