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Finding the Fourth Proportional to 16,917.20, 25,404.60 and 12,539.60

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Solution

The fourth proportional to 16,917.20, 25,404.60 and 12,539.60 is: 18,830.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,917.20 : 25,404.60 = 12,539.60 : x
  2. Step 2: Convert to fraction form
    16,917.20/25,404.60 = 12,539.60/x
  3. Step 3: Cross multiply
    16,917.20x = 25,404.60 × 12,539.60
  4. Step 4: Simplify right side
    16,917.20x = 318,563,522.16
  5. Step 5: Solve for x
    x = 318,563,522.16/16,917.20
  6. Step 6: Final answer
    x = 18,830.75

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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.