Home / 20,090.74-27,725.87-11,139.08

Finding the Fourth Proportional to 20,090.74, 27,725.87 and 11,139.08

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Solution

The fourth proportional to 20,090.74, 27,725.87 and 11,139.08 is: 15,372.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,090.74 : 27,725.87 = 11,139.08 : x
  2. Step 2: Convert to fraction form
    20,090.74/27,725.87 = 11,139.08/x
  3. Step 3: Cross multiply
    20,090.74x = 27,725.87 × 11,139.08
  4. Step 4: Simplify right side
    20,090.74x = 308,840,573.22
  5. Step 5: Solve for x
    x = 308,840,573.22/20,090.74
  6. Step 6: Final answer
    x = 15,372.29

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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.