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Finding the Fourth Proportional to 43,878.60, 65,813.04 and 12,713.85

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Solution

The fourth proportional to 43,878.60, 65,813.04 and 12,713.85 is: 19,069.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,878.60 : 65,813.04 = 12,713.85 : x
  2. Step 2: Convert to fraction form
    43,878.60/65,813.04 = 12,713.85/x
  3. Step 3: Cross multiply
    43,878.60x = 65,813.04 × 12,713.85
  4. Step 4: Simplify right side
    43,878.60x = 836,737,118.60
  5. Step 5: Solve for x
    x = 836,737,118.60/43,878.60
  6. Step 6: Final answer
    x = 19,069.37

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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.