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Finding the Fourth Proportional to 29,112.30, 40,163.31 and 18,353.63

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Solution

The fourth proportional to 29,112.30, 40,163.31 and 18,353.63 is: 25,320.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,112.30 : 40,163.31 = 18,353.63 : x
  2. Step 2: Convert to fraction form
    29,112.30/40,163.31 = 18,353.63/x
  3. Step 3: Cross multiply
    29,112.30x = 40,163.31 × 18,353.63
  4. Step 4: Simplify right side
    29,112.30x = 737,142,631.72
  5. Step 5: Solve for x
    x = 737,142,631.72/29,112.30
  6. Step 6: Final answer
    x = 25,320.66

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1.5x scale

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.