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Finding the Fourth Proportional to 20,235.80, 30,280.80 and 13,674.80

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Solution

The fourth proportional to 20,235.80, 30,280.80 and 13,674.80 is: 20,462.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,235.80 : 30,280.80 = 13,674.80 : x
  2. Step 2: Convert to fraction form
    20,235.80/30,280.80 = 13,674.80/x
  3. Step 3: Cross multiply
    20,235.80x = 30,280.80 × 13,674.80
  4. Step 4: Simplify right side
    20,235.80x = 414,083,883.84
  5. Step 5: Solve for x
    x = 414,083,883.84/20,235.80
  6. Step 6: Final answer
    x = 20,462.94

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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.