Home / 13,218.70-19,789.09-11,578.45

Finding the Fourth Proportional to 13,218.70, 19,789.09 and 11,578.45

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Solution

The fourth proportional to 13,218.70, 19,789.09 and 11,578.45 is: 17,333.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,218.70 : 19,789.09 = 11,578.45 : x
  2. Step 2: Convert to fraction form
    13,218.70/19,789.09 = 11,578.45/x
  3. Step 3: Cross multiply
    13,218.70x = 19,789.09 × 11,578.45
  4. Step 4: Simplify right side
    13,218.70x = 229,127,012.92
  5. Step 5: Solve for x
    x = 229,127,012.92/13,218.70
  6. Step 6: Final answer
    x = 17,333.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.