Home / 7,830.17-11,745.23-1,986.77

Finding the Fourth Proportional to 7,830.17, 11,745.23 and 1,986.77

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Solution

The fourth proportional to 7,830.17, 11,745.23 and 1,986.77 is: 2,980.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,830.17 : 11,745.23 = 1,986.77 : x
  2. Step 2: Convert to fraction form
    7,830.17/11,745.23 = 1,986.77/x
  3. Step 3: Cross multiply
    7,830.17x = 11,745.23 × 1,986.77
  4. Step 4: Simplify right side
    7,830.17x = 23,335,070.61
  5. Step 5: Solve for x
    x = 23,335,070.61/7,830.17
  6. Step 6: Final answer
    x = 2,980.15

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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.