Home / 21,072.05-29,079.41-12,119.32

Finding the Fourth Proportional to 21,072.05, 29,079.41 and 12,119.32

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Solution

The fourth proportional to 21,072.05, 29,079.41 and 12,119.32 is: 16,724.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,072.05 : 29,079.41 = 12,119.32 : x
  2. Step 2: Convert to fraction form
    21,072.05/29,079.41 = 12,119.32/x
  3. Step 3: Cross multiply
    21,072.05x = 29,079.41 × 12,119.32
  4. Step 4: Simplify right side
    21,072.05x = 352,422,650.95
  5. Step 5: Solve for x
    x = 352,422,650.95/21,072.05
  6. Step 6: Final answer
    x = 16,724.65

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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.