Home / 13,928.56-19,221.78-7,961.20

Finding the Fourth Proportional to 13,928.56, 19,221.78 and 7,961.20

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Solution

The fourth proportional to 13,928.56, 19,221.78 and 7,961.20 is: 10,986.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,928.56 : 19,221.78 = 7,961.20 : x
  2. Step 2: Convert to fraction form
    13,928.56/19,221.78 = 7,961.20/x
  3. Step 3: Cross multiply
    13,928.56x = 19,221.78 × 7,961.20
  4. Step 4: Simplify right side
    13,928.56x = 153,028,434.94
  5. Step 5: Solve for x
    x = 153,028,434.94/13,928.56
  6. Step 6: Final answer
    x = 10,986.67

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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.