Home / 20,853.78-28,778.00-11,293.51

Finding the Fourth Proportional to 20,853.78, 28,778.00 and 11,293.51

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Solution

The fourth proportional to 20,853.78, 28,778.00 and 11,293.51 is: 15,584.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,853.78 : 28,778.00 = 11,293.51 : x
  2. Step 2: Convert to fraction form
    20,853.78/28,778.00 = 11,293.51/x
  3. Step 3: Cross multiply
    20,853.78x = 28,778.00 × 11,293.51
  4. Step 4: Simplify right side
    20,853.78x = 325,004,502.37
  5. Step 5: Solve for x
    x = 325,004,502.37/20,853.78
  6. Step 6: Final answer
    x = 15,584.92

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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.