Home / 19,918.09-27,485.89-11,419.80

Finding the Fourth Proportional to 19,918.09, 27,485.89 and 11,419.80

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Solution

The fourth proportional to 19,918.09, 27,485.89 and 11,419.80 is: 15,758.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,918.09 : 27,485.89 = 11,419.80 : x
  2. Step 2: Convert to fraction form
    19,918.09/27,485.89 = 11,419.80/x
  3. Step 3: Cross multiply
    19,918.09x = 27,485.89 × 11,419.80
  4. Step 4: Simplify right side
    19,918.09x = 313,883,235.00
  5. Step 5: Solve for x
    x = 313,883,235.00/19,918.09
  6. Step 6: Final answer
    x = 15,758.70

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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.