Home / 21,181.30-29,230.41-11,621.20

Finding the Fourth Proportional to 21,181.30, 29,230.41 and 11,621.20

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Solution

The fourth proportional to 21,181.30, 29,230.41 and 11,621.20 is: 16,037.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,181.30 : 29,230.41 = 11,621.20 : x
  2. Step 2: Convert to fraction form
    21,181.30/29,230.41 = 11,621.20/x
  3. Step 3: Cross multiply
    21,181.30x = 29,230.41 × 11,621.20
  4. Step 4: Simplify right side
    21,181.30x = 339,692,440.69
  5. Step 5: Solve for x
    x = 339,692,440.69/21,181.30
  6. Step 6: Final answer
    x = 16,037.37

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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.