Home / 20,847.12-28,768.74-11,894.10

Finding the Fourth Proportional to 20,847.12, 28,768.74 and 11,894.10

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Solution

The fourth proportional to 20,847.12, 28,768.74 and 11,894.10 is: 16,413.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,847.12 : 28,768.74 = 11,894.10 : x
  2. Step 2: Convert to fraction form
    20,847.12/28,768.74 = 11,894.10/x
  3. Step 3: Cross multiply
    20,847.12x = 28,768.74 × 11,894.10
  4. Step 4: Simplify right side
    20,847.12x = 342,178,270.43
  5. Step 5: Solve for x
    x = 342,178,270.43/20,847.12
  6. Step 6: Final answer
    x = 16,413.70

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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.