Home / 13,928.45-19,221.56-7,640.82

Finding the Fourth Proportional to 13,928.45, 19,221.56 and 7,640.82

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Solution

The fourth proportional to 13,928.45, 19,221.56 and 7,640.82 is: 10,544.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,928.45 : 19,221.56 = 7,640.82 : x
  2. Step 2: Convert to fraction form
    13,928.45/19,221.56 = 7,640.82/x
  3. Step 3: Cross multiply
    13,928.45x = 19,221.56 × 7,640.82
  4. Step 4: Simplify right side
    13,928.45x = 146,868,441.88
  5. Step 5: Solve for x
    x = 146,868,441.88/13,928.45
  6. Step 6: Final answer
    x = 10,544.50

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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.