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Finding the Fourth Proportional to 19,828.20, 29,815.20 and 16,620.60

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Solution

The fourth proportional to 19,828.20, 29,815.20 and 16,620.60 is: 24,992.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,828.20 : 29,815.20 = 16,620.60 : x
  2. Step 2: Convert to fraction form
    19,828.20/29,815.20 = 16,620.60/x
  3. Step 3: Cross multiply
    19,828.20x = 29,815.20 × 16,620.60
  4. Step 4: Simplify right side
    19,828.20x = 495,546,513.12
  5. Step 5: Solve for x
    x = 495,546,513.12/19,828.20
  6. Step 6: Final answer
    x = 24,992.01

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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.