Home / 21,558.32-29,750.88-11,999

Finding the Fourth Proportional to 21,558.32, 29,750.88 and 11,999

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Solution

The fourth proportional to 21,558.32, 29,750.88 and 11,999 is: 16,558.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,558.32 : 29,750.88 = 11,999 : x
  2. Step 2: Convert to fraction form
    21,558.32/29,750.88 = 11,999/x
  3. Step 3: Cross multiply
    21,558.32x = 29,750.88 × 11,999
  4. Step 4: Simplify right side
    21,558.32x = 356,980,809.12
  5. Step 5: Solve for x
    x = 356,980,809.12/21,558.32
  6. Step 6: Final answer
    x = 16,558.84

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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.