Home / 13,830.48-20,786.22-11,505.78

Finding the Fourth Proportional to 13,830.48, 20,786.22 and 11,505.78

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Solution

The fourth proportional to 13,830.48, 20,786.22 and 11,505.78 is: 17,292.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,830.48 : 20,786.22 = 11,505.78 : x
  2. Step 2: Convert to fraction form
    13,830.48/20,786.22 = 11,505.78/x
  3. Step 3: Cross multiply
    13,830.48x = 20,786.22 × 11,505.78
  4. Step 4: Simplify right side
    13,830.48x = 239,161,674.35
  5. Step 5: Solve for x
    x = 239,161,674.35/13,830.48
  6. Step 6: Final answer
    x = 17,292.36

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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.