Home / 13,910.32-19,196.40-7,622.80

Finding the Fourth Proportional to 13,910.32, 19,196.40 and 7,622.80

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Solution

The fourth proportional to 13,910.32, 19,196.40 and 7,622.80 is: 10,519.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,910.32 : 19,196.40 = 7,622.80 : x
  2. Step 2: Convert to fraction form
    13,910.32/19,196.40 = 7,622.80/x
  3. Step 3: Cross multiply
    13,910.32x = 19,196.40 × 7,622.80
  4. Step 4: Simplify right side
    13,910.32x = 146,330,317.92
  5. Step 5: Solve for x
    x = 146,330,317.92/13,910.32
  6. Step 6: Final answer
    x = 10,519.55

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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.