Home / 20,950.77-28,918.32-13,786.21

Finding the Fourth Proportional to 20,950.77, 28,918.32 and 13,786.21

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Solution

The fourth proportional to 20,950.77, 28,918.32 and 13,786.21 is: 19,029.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,950.77 : 28,918.32 = 13,786.21 : x
  2. Step 2: Convert to fraction form
    20,950.77/28,918.32 = 13,786.21/x
  3. Step 3: Cross multiply
    20,950.77x = 28,918.32 × 13,786.21
  4. Step 4: Simplify right side
    20,950.77x = 398,674,057.48
  5. Step 5: Solve for x
    x = 398,674,057.48/20,950.77
  6. Step 6: Final answer
    x = 19,029.09

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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.