Home / 21,968.80-30,314.62-12,407.84

Finding the Fourth Proportional to 21,968.80, 30,314.62 and 12,407.84

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Solution

The fourth proportional to 21,968.80, 30,314.62 and 12,407.84 is: 17,121.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,968.80 : 30,314.62 = 12,407.84 : x
  2. Step 2: Convert to fraction form
    21,968.80/30,314.62 = 12,407.84/x
  3. Step 3: Cross multiply
    21,968.80x = 30,314.62 × 12,407.84
  4. Step 4: Simplify right side
    21,968.80x = 376,138,954.62
  5. Step 5: Solve for x
    x = 376,138,954.62/21,968.80
  6. Step 6: Final answer
    x = 17,121.51

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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.