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Finding the Fourth Proportional to 43,309.91, 64,969.13 and 18,004.21

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Solution

The fourth proportional to 43,309.91, 64,969.13 and 18,004.21 is: 27,008.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,309.91 : 64,969.13 = 18,004.21 : x
  2. Step 2: Convert to fraction form
    43,309.91/64,969.13 = 18,004.21/x
  3. Step 3: Cross multiply
    43,309.91x = 64,969.13 × 18,004.21
  4. Step 4: Simplify right side
    43,309.91x = 1,169,717,742.62
  5. Step 5: Solve for x
    x = 1,169,717,742.62/43,309.91
  6. Step 6: Final answer
    x = 27,008.08

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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.