Home / 21,090.21-29,104.62-11,530.11

Finding the Fourth Proportional to 21,090.21, 29,104.62 and 11,530.11

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Solution

The fourth proportional to 21,090.21, 29,104.62 and 11,530.11 is: 15,911.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,090.21 : 29,104.62 = 11,530.11 : x
  2. Step 2: Convert to fraction form
    21,090.21/29,104.62 = 11,530.11/x
  3. Step 3: Cross multiply
    21,090.21x = 29,104.62 × 11,530.11
  4. Step 4: Simplify right side
    21,090.21x = 335,579,536.01
  5. Step 5: Solve for x
    x = 335,579,536.01/21,090.21
  6. Step 6: Final answer
    x = 15,911.63

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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.