Home / 21,071.32-29,076.94-12,118.80

Finding the Fourth Proportional to 21,071.32, 29,076.94 and 12,118.80

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Solution

The fourth proportional to 21,071.32, 29,076.94 and 12,118.80 is: 16,723.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,071.32 : 29,076.94 = 12,118.80 : x
  2. Step 2: Convert to fraction form
    21,071.32/29,076.94 = 12,118.80/x
  3. Step 3: Cross multiply
    21,071.32x = 29,076.94 × 12,118.80
  4. Step 4: Simplify right side
    21,071.32x = 352,377,620.47
  5. Step 5: Solve for x
    x = 352,377,620.47/21,071.32
  6. Step 6: Final answer
    x = 16,723.09

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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.