Home / 5,190.09-7,780.81-2,415.30

Finding the Fourth Proportional to 5,190.09, 7,780.81 and 2,415.30

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Solution

The fourth proportional to 5,190.09, 7,780.81 and 2,415.30 is: 3,620.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,190.09 : 7,780.81 = 2,415.30 : x
  2. Step 2: Convert to fraction form
    5,190.09/7,780.81 = 2,415.30/x
  3. Step 3: Cross multiply
    5,190.09x = 7,780.81 × 2,415.30
  4. Step 4: Simplify right side
    5,190.09x = 18,792,990.39
  5. Step 5: Solve for x
    x = 18,792,990.39/5,190.09
  6. Step 6: Final answer
    x = 3,620.94

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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.