Home / 21,080.13-29,090.96-11,520.42

Finding the Fourth Proportional to 21,080.13, 29,090.96 and 11,520.42

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Solution

The fourth proportional to 21,080.13, 29,090.96 and 11,520.42 is: 15,898.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,080.13 : 29,090.96 = 11,520.42 : x
  2. Step 2: Convert to fraction form
    21,080.13/29,090.96 = 11,520.42/x
  3. Step 3: Cross multiply
    21,080.13x = 29,090.96 × 11,520.42
  4. Step 4: Simplify right side
    21,080.13x = 335,140,077.40
  5. Step 5: Solve for x
    x = 335,140,077.40/21,080.13
  6. Step 6: Final answer
    x = 15,898.39

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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.