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Finding the Fourth Proportional to 34,230.80, 51,378.60 and 21,108.80

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Solution

The fourth proportional to 34,230.80, 51,378.60 and 21,108.80 is: 31,683.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,230.80 : 51,378.60 = 21,108.80 : x
  2. Step 2: Convert to fraction form
    34,230.80/51,378.60 = 21,108.80/x
  3. Step 3: Cross multiply
    34,230.80x = 51,378.60 × 21,108.80
  4. Step 4: Simplify right side
    34,230.80x = 1,084,540,591.68
  5. Step 5: Solve for x
    x = 1,084,540,591.68/34,230.80
  6. Step 6: Final answer
    x = 31,683.18

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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.