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Finding the Fourth Proportional to 29,640.96, 40,917.12 and 18,468.48

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Solution

The fourth proportional to 29,640.96, 40,917.12 and 18,468.48 is: 25,494.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,640.96 : 40,917.12 = 18,468.48 : x
  2. Step 2: Convert to fraction form
    29,640.96/40,917.12 = 18,468.48/x
  3. Step 3: Cross multiply
    29,640.96x = 40,917.12 × 18,468.48
  4. Step 4: Simplify right side
    29,640.96x = 755,677,012.38
  5. Step 5: Solve for x
    x = 755,677,012.38/29,640.96
  6. Step 6: Final answer
    x = 25,494.35

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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.