Home / 20,383.65-28,131.03-11,433.15

Finding the Fourth Proportional to 20,383.65, 28,131.03 and 11,433.15

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Solution

The fourth proportional to 20,383.65, 28,131.03 and 11,433.15 is: 15,778.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,383.65 : 28,131.03 = 11,433.15 : x
  2. Step 2: Convert to fraction form
    20,383.65/28,131.03 = 11,433.15/x
  3. Step 3: Cross multiply
    20,383.65x = 28,131.03 × 11,433.15
  4. Step 4: Simplify right side
    20,383.65x = 321,626,285.64
  5. Step 5: Solve for x
    x = 321,626,285.64/20,383.65
  6. Step 6: Final answer
    x = 15,778.64

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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.