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Finding the Fourth Proportional to 43,603.25, 65,405.49 and 12,438.50

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Solution

The fourth proportional to 43,603.25, 65,405.49 and 12,438.50 is: 18,657.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,603.25 : 65,405.49 = 12,438.50 : x
  2. Step 2: Convert to fraction form
    43,603.25/65,405.49 = 12,438.50/x
  3. Step 3: Cross multiply
    43,603.25x = 65,405.49 × 12,438.50
  4. Step 4: Simplify right side
    43,603.25x = 813,546,187.37
  5. Step 5: Solve for x
    x = 813,546,187.37/43,603.25
  6. Step 6: Final answer
    x = 18,657.93

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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.