Home / 7,830.45-11,745.72-1,987.05

Finding the Fourth Proportional to 7,830.45, 11,745.72 and 1,987.05

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Solution

The fourth proportional to 7,830.45, 11,745.72 and 1,987.05 is: 2,980.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,830.45 : 11,745.72 = 1,987.05 : x
  2. Step 2: Convert to fraction form
    7,830.45/11,745.72 = 1,987.05/x
  3. Step 3: Cross multiply
    7,830.45x = 11,745.72 × 1,987.05
  4. Step 4: Simplify right side
    7,830.45x = 23,339,332.93
  5. Step 5: Solve for x
    x = 23,339,332.93/7,830.45
  6. Step 6: Final answer
    x = 2,980.59

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1.5x scale

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.