Home / 7,830.15-11,745.63-1,986.81

Finding the Fourth Proportional to 7,830.15, 11,745.63 and 1,986.81

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Solution

The fourth proportional to 7,830.15, 11,745.63 and 1,986.81 is: 2,980.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,830.15 : 11,745.63 = 1,986.81 : x
  2. Step 2: Convert to fraction form
    7,830.15/11,745.63 = 1,986.81/x
  3. Step 3: Cross multiply
    7,830.15x = 11,745.63 × 1,986.81
  4. Step 4: Simplify right side
    7,830.15x = 23,336,335.14
  5. Step 5: Solve for x
    x = 23,336,335.14/7,830.15
  6. Step 6: Final answer
    x = 2,980.32

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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.