Home / 20,138.51-27,779.96-18,713.03

Finding the Fourth Proportional to 20,138.51, 27,779.96 and 18,713.03

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Solution

The fourth proportional to 20,138.51, 27,779.96 and 18,713.03 is: 25,813.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,138.51 : 27,779.96 = 18,713.03 : x
  2. Step 2: Convert to fraction form
    20,138.51/27,779.96 = 18,713.03/x
  3. Step 3: Cross multiply
    20,138.51x = 27,779.96 × 18,713.03
  4. Step 4: Simplify right side
    20,138.51x = 519,846,992.41
  5. Step 5: Solve for x
    x = 519,846,992.41/20,138.51
  6. Step 6: Final answer
    x = 25,813.58

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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.