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Finding the Fourth Proportional to 30,796.48, 42,489.48 and 18,847.36

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Solution

The fourth proportional to 30,796.48, 42,489.48 and 18,847.36 is: 26,003.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,796.48 : 42,489.48 = 18,847.36 : x
  2. Step 2: Convert to fraction form
    30,796.48/42,489.48 = 18,847.36/x
  3. Step 3: Cross multiply
    30,796.48x = 42,489.48 × 18,847.36
  4. Step 4: Simplify right side
    30,796.48x = 800,814,525.77
  5. Step 5: Solve for x
    x = 800,814,525.77/30,796.48
  6. Step 6: Final answer
    x = 26,003.44

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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.