Home / 21,481.04-29,643.86-11,920.62

Finding the Fourth Proportional to 21,481.04, 29,643.86 and 11,920.62

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Solution

The fourth proportional to 21,481.04, 29,643.86 and 11,920.62 is: 16,450.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,481.04 : 29,643.86 = 11,920.62 : x
  2. Step 2: Convert to fraction form
    21,481.04/29,643.86 = 11,920.62/x
  3. Step 3: Cross multiply
    21,481.04x = 29,643.86 × 11,920.62
  4. Step 4: Simplify right side
    21,481.04x = 353,373,190.39
  5. Step 5: Solve for x
    x = 353,373,190.39/21,481.04
  6. Step 6: Final answer
    x = 16,450.47

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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.