Home / 21,968.82-30,317.40-12,406.95

Finding the Fourth Proportional to 21,968.82, 30,317.40 and 12,406.95

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Solution

The fourth proportional to 21,968.82, 30,317.40 and 12,406.95 is: 17,121.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,968.82 : 30,317.40 = 12,406.95 : x
  2. Step 2: Convert to fraction form
    21,968.82/30,317.40 = 12,406.95/x
  3. Step 3: Cross multiply
    21,968.82x = 30,317.40 × 12,406.95
  4. Step 4: Simplify right side
    21,968.82x = 376,146,465.93
  5. Step 5: Solve for x
    x = 376,146,465.93/21,968.82
  6. Step 6: Final answer
    x = 17,121.83

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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.