Home / 21,883.83-30,201.84-13,389.78

Finding the Fourth Proportional to 21,883.83, 30,201.84 and 13,389.78

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Solution

The fourth proportional to 21,883.83, 30,201.84 and 13,389.78 is: 18,479.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,883.83 : 30,201.84 = 13,389.78 : x
  2. Step 2: Convert to fraction form
    21,883.83/30,201.84 = 13,389.78/x
  3. Step 3: Cross multiply
    21,883.83x = 30,201.84 × 13,389.78
  4. Step 4: Simplify right side
    21,883.83x = 404,395,993.20
  5. Step 5: Solve for x
    x = 404,395,993.20/21,883.83
  6. Step 6: Final answer
    x = 18,479.21

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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.