Home / 9,379.12-12,942.70-5,129.35

Finding the Fourth Proportional to 9,379.12, 12,942.70 and 5,129.35

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Solution

The fourth proportional to 9,379.12, 12,942.70 and 5,129.35 is: 7,078.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,379.12 : 12,942.70 = 5,129.35 : x
  2. Step 2: Convert to fraction form
    9,379.12/12,942.70 = 5,129.35/x
  3. Step 3: Cross multiply
    9,379.12x = 12,942.70 × 5,129.35
  4. Step 4: Simplify right side
    9,379.12x = 66,387,638.25
  5. Step 5: Solve for x
    x = 66,387,638.25/9,379.12
  6. Step 6: Final answer
    x = 7,078.24

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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.