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Finding the Fourth Proportional to 28,081.48, 38,768.20 and 19,480.20

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Solution

The fourth proportional to 28,081.48, 38,768.20 and 19,480.20 is: 26,893.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,081.48 : 38,768.20 = 19,480.20 : x
  2. Step 2: Convert to fraction form
    28,081.48/38,768.20 = 19,480.20/x
  3. Step 3: Cross multiply
    28,081.48x = 38,768.20 × 19,480.20
  4. Step 4: Simplify right side
    28,081.48x = 755,212,289.64
  5. Step 5: Solve for x
    x = 755,212,289.64/28,081.48
  6. Step 6: Final answer
    x = 26,893.61

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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.