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Finding the Fourth Proportional to 16,771.20, 25,135.20 and 12,856.20

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Solution

The fourth proportional to 16,771.20, 25,135.20 and 12,856.20 is: 19,267.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,771.20 : 25,135.20 = 12,856.20 : x
  2. Step 2: Convert to fraction form
    16,771.20/25,135.20 = 12,856.20/x
  3. Step 3: Cross multiply
    16,771.20x = 25,135.20 × 12,856.20
  4. Step 4: Simplify right side
    16,771.20x = 323,143,158.24
  5. Step 5: Solve for x
    x = 323,143,158.24/16,771.20
  6. Step 6: Final answer
    x = 19,267.74

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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.