Home / 21,090.31-29,104.68-11,658.88

Finding the Fourth Proportional to 21,090.31, 29,104.68 and 11,658.88

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Solution

The fourth proportional to 21,090.31, 29,104.68 and 11,658.88 is: 16,089.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,090.31 : 29,104.68 = 11,658.88 : x
  2. Step 2: Convert to fraction form
    21,090.31/29,104.68 = 11,658.88/x
  3. Step 3: Cross multiply
    21,090.31x = 29,104.68 × 11,658.88
  4. Step 4: Simplify right side
    21,090.31x = 339,327,971.56
  5. Step 5: Solve for x
    x = 339,327,971.56/21,090.31
  6. Step 6: Final answer
    x = 16,089.28

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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.