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Finding the Fourth Proportional to 12,877.96, 19,311.98 and 5,485.96

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Solution

The fourth proportional to 12,877.96, 19,311.98 and 5,485.96 is: 8,226.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,877.96 : 19,311.98 = 5,485.96 : x
  2. Step 2: Convert to fraction form
    12,877.96/19,311.98 = 5,485.96/x
  3. Step 3: Cross multiply
    12,877.96x = 19,311.98 × 5,485.96
  4. Step 4: Simplify right side
    12,877.96x = 105,944,749.80
  5. Step 5: Solve for x
    x = 105,944,749.80/12,877.96
  6. Step 6: Final answer
    x = 8,226.83

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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.