Home / 13,078.56-19,628.78-6,840.75

Finding the Fourth Proportional to 13,078.56, 19,628.78 and 6,840.75

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Solution

The fourth proportional to 13,078.56, 19,628.78 and 6,840.75 is: 10,266.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,078.56 : 19,628.78 = 6,840.75 : x
  2. Step 2: Convert to fraction form
    13,078.56/19,628.78 = 6,840.75/x
  3. Step 3: Cross multiply
    13,078.56x = 19,628.78 × 6,840.75
  4. Step 4: Simplify right side
    13,078.56x = 134,275,576.79
  5. Step 5: Solve for x
    x = 134,275,576.79/13,078.56
  6. Step 6: Final answer
    x = 10,266.85

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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.