Home / 20,981.66-31,477.38-6,941.12

Finding the Fourth Proportional to 20,981.66, 31,477.38 and 6,941.12

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Solution

The fourth proportional to 20,981.66, 31,477.38 and 6,941.12 is: 10,413.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,981.66 : 31,477.38 = 6,941.12 : x
  2. Step 2: Convert to fraction form
    20,981.66/31,477.38 = 6,941.12/x
  3. Step 3: Cross multiply
    20,981.66x = 31,477.38 × 6,941.12
  4. Step 4: Simplify right side
    20,981.66x = 218,488,271.87
  5. Step 5: Solve for x
    x = 218,488,271.87/20,981.66
  6. Step 6: Final answer
    x = 10,413.30

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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.