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Finding the Fourth Proportional to 43,287.64, 64,938.28 and 18,327.84

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Solution

The fourth proportional to 43,287.64, 64,938.28 and 18,327.84 is: 27,494.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,287.64 : 64,938.28 = 18,327.84 : x
  2. Step 2: Convert to fraction form
    43,287.64/64,938.28 = 18,327.84/x
  3. Step 3: Cross multiply
    43,287.64x = 64,938.28 × 18,327.84
  4. Step 4: Simplify right side
    43,287.64x = 1,190,178,405.72
  5. Step 5: Solve for x
    x = 1,190,178,405.72/43,287.64
  6. Step 6: Final answer
    x = 27,494.65

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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.