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Finding the Fourth Proportional to 43,999.90, 65,999.85 and 12,838.30

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Solution

The fourth proportional to 43,999.90, 65,999.85 and 12,838.30 is: 19,257.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,999.90 : 65,999.85 = 12,838.30 : x
  2. Step 2: Convert to fraction form
    43,999.90/65,999.85 = 12,838.30/x
  3. Step 3: Cross multiply
    43,999.90x = 65,999.85 × 12,838.30
  4. Step 4: Simplify right side
    43,999.90x = 847,325,874.26
  5. Step 5: Solve for x
    x = 847,325,874.26/43,999.90
  6. Step 6: Final answer
    x = 19,257.45

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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.