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Finding the Fourth Proportional to 43,612.12, 65,402.31 and 18,653.99

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Solution

The fourth proportional to 43,612.12, 65,402.31 and 18,653.99 is: 27,974.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,612.12 : 65,402.31 = 18,653.99 : x
  2. Step 2: Convert to fraction form
    43,612.12/65,402.31 = 18,653.99/x
  3. Step 3: Cross multiply
    43,612.12x = 65,402.31 × 18,653.99
  4. Step 4: Simplify right side
    43,612.12x = 1,220,014,036.72
  5. Step 5: Solve for x
    x = 1,220,014,036.72/43,612.12
  6. Step 6: Final answer
    x = 27,974.20

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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.