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Finding the Fourth Proportional to 20,554.78, 30,820.28 and 8,060.26

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Solution

The fourth proportional to 20,554.78, 30,820.28 and 8,060.26 is: 12,085.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,554.78 : 30,820.28 = 8,060.26 : x
  2. Step 2: Convert to fraction form
    20,554.78/30,820.28 = 8,060.26/x
  3. Step 3: Cross multiply
    20,554.78x = 30,820.28 × 8,060.26
  4. Step 4: Simplify right side
    20,554.78x = 248,419,470.07
  5. Step 5: Solve for x
    x = 248,419,470.07/20,554.78
  6. Step 6: Final answer
    x = 12,085.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.