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Finding the Fourth Proportional to 43,604, 65,406.63 and 12,439.25

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Solution

The fourth proportional to 43,604, 65,406.63 and 12,439.25 is: 18,659.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,604 : 65,406.63 = 12,439.25 : x
  2. Step 2: Convert to fraction form
    43,604/65,406.63 = 12,439.25/x
  3. Step 3: Cross multiply
    43,604x = 65,406.63 × 12,439.25
  4. Step 4: Simplify right side
    43,604x = 813,609,422.23
  5. Step 5: Solve for x
    x = 813,609,422.23/43,604
  6. Step 6: Final answer
    x = 18,659.05

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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.