Home / 20,383.27-28,119.31-14,418.23

Finding the Fourth Proportional to 20,383.27, 28,119.31 and 14,418.23

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Solution

The fourth proportional to 20,383.27, 28,119.31 and 14,418.23 is: 19,890.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,383.27 : 28,119.31 = 14,418.23 : x
  2. Step 2: Convert to fraction form
    20,383.27/28,119.31 = 14,418.23/x
  3. Step 3: Cross multiply
    20,383.27x = 28,119.31 × 14,418.23
  4. Step 4: Simplify right side
    20,383.27x = 405,430,502.38
  5. Step 5: Solve for x
    x = 405,430,502.38/20,383.27
  6. Step 6: Final answer
    x = 19,890.36

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Double scale
Find fourth proportional to 20,384.27, 28,120.69 and 14,419.23
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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.