Home / 21,983.22-30,338.33-12,419.79

Finding the Fourth Proportional to 21,983.22, 30,338.33 and 12,419.79

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Solution

The fourth proportional to 21,983.22, 30,338.33 and 12,419.79 is: 17,140.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,983.22 : 30,338.33 = 12,419.79 : x
  2. Step 2: Convert to fraction form
    21,983.22/30,338.33 = 12,419.79/x
  3. Step 3: Cross multiply
    21,983.22x = 30,338.33 × 12,419.79
  4. Step 4: Simplify right side
    21,983.22x = 376,795,473.76
  5. Step 5: Solve for x
    x = 376,795,473.76/21,983.22
  6. Step 6: Final answer
    x = 17,140.14

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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.