Home / 5,807.80-8,012.28-3,920.60

Finding the Fourth Proportional to 5,807.80, 8,012.28 and 3,920.60

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Solution

The fourth proportional to 5,807.80, 8,012.28 and 3,920.60 is: 5,408.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,807.80 : 8,012.28 = 3,920.60 : x
  2. Step 2: Convert to fraction form
    5,807.80/8,012.28 = 3,920.60/x
  3. Step 3: Cross multiply
    5,807.80x = 8,012.28 × 3,920.60
  4. Step 4: Simplify right side
    5,807.80x = 31,412,944.97
  5. Step 5: Solve for x
    x = 31,412,944.97/5,807.80
  6. Step 6: Final answer
    x = 5,408.75

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1.5x scale

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.