Home / 21,871.96-30,181.26-12,440.20

Finding the Fourth Proportional to 21,871.96, 30,181.26 and 12,440.20

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Solution

The fourth proportional to 21,871.96, 30,181.26 and 12,440.20 is: 17,166.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,871.96 : 30,181.26 = 12,440.20 : x
  2. Step 2: Convert to fraction form
    21,871.96/30,181.26 = 12,440.20/x
  3. Step 3: Cross multiply
    21,871.96x = 30,181.26 × 12,440.20
  4. Step 4: Simplify right side
    21,871.96x = 375,460,910.65
  5. Step 5: Solve for x
    x = 375,460,910.65/21,871.96
  6. Step 6: Final answer
    x = 17,166.31

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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.