Home / 13,928.36-19,221-7,640.80

Finding the Fourth Proportional to 13,928.36, 19,221 and 7,640.80

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Solution

The fourth proportional to 13,928.36, 19,221 and 7,640.80 is: 10,544.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,928.36 : 19,221 = 7,640.80 : x
  2. Step 2: Convert to fraction form
    13,928.36/19,221 = 7,640.80/x
  3. Step 3: Cross multiply
    13,928.36x = 19,221 × 7,640.80
  4. Step 4: Simplify right side
    13,928.36x = 146,863,816.80
  5. Step 5: Solve for x
    x = 146,863,816.80/13,928.36
  6. Step 6: Final answer
    x = 10,544.23

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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.