Home / 13,928.16-19,221.36-7,640.72

Finding the Fourth Proportional to 13,928.16, 19,221.36 and 7,640.72

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Solution

The fourth proportional to 13,928.16, 19,221.36 and 7,640.72 is: 10,544.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,928.16 : 19,221.36 = 7,640.72 : x
  2. Step 2: Convert to fraction form
    13,928.16/19,221.36 = 7,640.72/x
  3. Step 3: Cross multiply
    13,928.16x = 19,221.36 × 7,640.72
  4. Step 4: Simplify right side
    13,928.16x = 146,865,029.78
  5. Step 5: Solve for x
    x = 146,865,029.78/13,928.16
  6. Step 6: Final answer
    x = 10,544.47

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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.