Home / 21,072.96-29,077.30-12,120.84

Finding the Fourth Proportional to 21,072.96, 29,077.30 and 12,120.84

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Solution

The fourth proportional to 21,072.96, 29,077.30 and 12,120.84 is: 16,724.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,072.96 : 29,077.30 = 12,120.84 : x
  2. Step 2: Convert to fraction form
    21,072.96/29,077.30 = 12,120.84/x
  3. Step 3: Cross multiply
    21,072.96x = 29,077.30 × 12,120.84
  4. Step 4: Simplify right side
    21,072.96x = 352,441,300.93
  5. Step 5: Solve for x
    x = 352,441,300.93/21,072.96
  6. Step 6: Final answer
    x = 16,724.81

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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.