Home / 21,826.88-30,121.32-12,395.64

Finding the Fourth Proportional to 21,826.88, 30,121.32 and 12,395.64

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Solution

The fourth proportional to 21,826.88, 30,121.32 and 12,395.64 is: 17,106.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,826.88 : 30,121.32 = 12,395.64 : x
  2. Step 2: Convert to fraction form
    21,826.88/30,121.32 = 12,395.64/x
  3. Step 3: Cross multiply
    21,826.88x = 30,121.32 × 12,395.64
  4. Step 4: Simplify right side
    21,826.88x = 373,373,039.04
  5. Step 5: Solve for x
    x = 373,373,039.04/21,826.88
  6. Step 6: Final answer
    x = 17,106.11

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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.