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Finding the Fourth Proportional to 43,955.20, 65,900.40 and 18,974.80

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Solution

The fourth proportional to 43,955.20, 65,900.40 and 18,974.80 is: 28,448.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,955.20 : 65,900.40 = 18,974.80 : x
  2. Step 2: Convert to fraction form
    43,955.20/65,900.40 = 18,974.80/x
  3. Step 3: Cross multiply
    43,955.20x = 65,900.40 × 18,974.80
  4. Step 4: Simplify right side
    43,955.20x = 1,250,446,909.92
  5. Step 5: Solve for x
    x = 1,250,446,909.92/43,955.20
  6. Step 6: Final answer
    x = 28,448.21

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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.