Home / 21,105.44-29,106.24-18,120.32

Finding the Fourth Proportional to 21,105.44, 29,106.24 and 18,120.32

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Solution

The fourth proportional to 21,105.44, 29,106.24 and 18,120.32 is: 24,989.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,105.44 : 29,106.24 = 18,120.32 : x
  2. Step 2: Convert to fraction form
    21,105.44/29,106.24 = 18,120.32/x
  3. Step 3: Cross multiply
    21,105.44x = 29,106.24 × 18,120.32
  4. Step 4: Simplify right side
    21,105.44x = 527,414,382.80
  5. Step 5: Solve for x
    x = 527,414,382.80/21,105.44
  6. Step 6: Final answer
    x = 24,989.50

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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.