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Finding the Fourth Proportional to 43,393.40, 65,114.40 and 18,429.20

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Solution

The fourth proportional to 43,393.40, 65,114.40 and 18,429.20 is: 27,654.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,393.40 : 65,114.40 = 18,429.20 : x
  2. Step 2: Convert to fraction form
    43,393.40/65,114.40 = 18,429.20/x
  3. Step 3: Cross multiply
    43,393.40x = 65,114.40 × 18,429.20
  4. Step 4: Simplify right side
    43,393.40x = 1,200,006,300.48
  5. Step 5: Solve for x
    x = 1,200,006,300.48/43,393.40
  6. Step 6: Final answer
    x = 27,654.12

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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.