Home / 21,976.70-30,327.94-11,905.16

Finding the Fourth Proportional to 21,976.70, 30,327.94 and 11,905.16

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Solution

The fourth proportional to 21,976.70, 30,327.94 and 11,905.16 is: 16,429.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,976.70 : 30,327.94 = 11,905.16 : x
  2. Step 2: Convert to fraction form
    21,976.70/30,327.94 = 11,905.16/x
  3. Step 3: Cross multiply
    21,976.70x = 30,327.94 × 11,905.16
  4. Step 4: Simplify right side
    21,976.70x = 361,058,978.17
  5. Step 5: Solve for x
    x = 361,058,978.17/21,976.70
  6. Step 6: Final answer
    x = 16,429.17

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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.