Home / 5,111.40-7,667.10-2,778.60

Finding the Fourth Proportional to 5,111.40, 7,667.10 and 2,778.60

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Solution

The fourth proportional to 5,111.40, 7,667.10 and 2,778.60 is: 4,167.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,111.40 : 7,667.10 = 2,778.60 : x
  2. Step 2: Convert to fraction form
    5,111.40/7,667.10 = 2,778.60/x
  3. Step 3: Cross multiply
    5,111.40x = 7,667.10 × 2,778.60
  4. Step 4: Simplify right side
    5,111.40x = 21,303,804.06
  5. Step 5: Solve for x
    x = 21,303,804.06/5,111.40
  6. Step 6: Final answer
    x = 4,167.90

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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.