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Finding the Fourth Proportional to 18,077.15, 27,012.09 and 13,779.09

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Solution

The fourth proportional to 18,077.15, 27,012.09 and 13,779.09 is: 20,589.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,077.15 : 27,012.09 = 13,779.09 : x
  2. Step 2: Convert to fraction form
    18,077.15/27,012.09 = 13,779.09/x
  3. Step 3: Cross multiply
    18,077.15x = 27,012.09 × 13,779.09
  4. Step 4: Simplify right side
    18,077.15x = 372,202,019.20
  5. Step 5: Solve for x
    x = 372,202,019.20/18,077.15
  6. Step 6: Final answer
    x = 20,589.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.