Home / 20,383.48-28,128.82-11,430.94

Finding the Fourth Proportional to 20,383.48, 28,128.82 and 11,430.94

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Solution

The fourth proportional to 20,383.48, 28,128.82 and 11,430.94 is: 15,774.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,383.48 : 28,128.82 = 11,430.94 : x
  2. Step 2: Convert to fraction form
    20,383.48/28,128.82 = 11,430.94/x
  3. Step 3: Cross multiply
    20,383.48x = 28,128.82 × 11,430.94
  4. Step 4: Simplify right side
    20,383.48x = 321,538,853.69
  5. Step 5: Solve for x
    x = 321,538,853.69/20,383.48
  6. Step 6: Final answer
    x = 15,774.48

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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.