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Finding the Fourth Proportional to 19,522.80, 29,305.80 and 12,135.60

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Solution

The fourth proportional to 19,522.80, 29,305.80 and 12,135.60 is: 18,216.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,522.80 : 29,305.80 = 12,135.60 : x
  2. Step 2: Convert to fraction form
    19,522.80/29,305.80 = 12,135.60/x
  3. Step 3: Cross multiply
    19,522.80x = 29,305.80 × 12,135.60
  4. Step 4: Simplify right side
    19,522.80x = 355,643,466.48
  5. Step 5: Solve for x
    x = 355,643,466.48/19,522.80
  6. Step 6: Final answer
    x = 18,216.83

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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.