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Finding the Fourth Proportional to 29,580.21, 40,820.79 and 18,969.89

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Solution

The fourth proportional to 29,580.21, 40,820.79 and 18,969.89 is: 26,178.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,580.21 : 40,820.79 = 18,969.89 : x
  2. Step 2: Convert to fraction form
    29,580.21/40,820.79 = 18,969.89/x
  3. Step 3: Cross multiply
    29,580.21x = 40,820.79 × 18,969.89
  4. Step 4: Simplify right side
    29,580.21x = 774,365,691.91
  5. Step 5: Solve for x
    x = 774,365,691.91/29,580.21
  6. Step 6: Final answer
    x = 26,178.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.