Home / 28,779.14-43,174.62-12,139.22

Finding the Fourth Proportional to 28,779.14, 43,174.62 and 12,139.22

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Solution

The fourth proportional to 28,779.14, 43,174.62 and 12,139.22 is: 18,211.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,779.14 : 43,174.62 = 12,139.22 : x
  2. Step 2: Convert to fraction form
    28,779.14/43,174.62 = 12,139.22/x
  3. Step 3: Cross multiply
    28,779.14x = 43,174.62 × 12,139.22
  4. Step 4: Simplify right side
    28,779.14x = 524,105,994.72
  5. Step 5: Solve for x
    x = 524,105,994.72/28,779.14
  6. Step 6: Final answer
    x = 18,211.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.