Home / 7,790.52-11,690.40-3,112.80

Finding the Fourth Proportional to 7,790.52, 11,690.40 and 3,112.80

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Solution

The fourth proportional to 7,790.52, 11,690.40 and 3,112.80 is: 4,671.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,790.52 : 11,690.40 = 3,112.80 : x
  2. Step 2: Convert to fraction form
    7,790.52/11,690.40 = 3,112.80/x
  3. Step 3: Cross multiply
    7,790.52x = 11,690.40 × 3,112.80
  4. Step 4: Simplify right side
    7,790.52x = 36,389,877.12
  5. Step 5: Solve for x
    x = 36,389,877.12/7,790.52
  6. Step 6: Final answer
    x = 4,671.05

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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.