Home / 21,680.99-29,918.12-13,181.94

Finding the Fourth Proportional to 21,680.99, 29,918.12 and 13,181.94

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Solution

The fourth proportional to 21,680.99, 29,918.12 and 13,181.94 is: 18,190.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,680.99 : 29,918.12 = 13,181.94 : x
  2. Step 2: Convert to fraction form
    21,680.99/29,918.12 = 13,181.94/x
  3. Step 3: Cross multiply
    21,680.99x = 29,918.12 × 13,181.94
  4. Step 4: Simplify right side
    21,680.99x = 394,378,647.25
  5. Step 5: Solve for x
    x = 394,378,647.25/21,680.99
  6. Step 6: Final answer
    x = 18,190.07

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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.