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Finding the Fourth Proportional to 30,491.88, 42,092.04 and 18,558.96

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Solution

The fourth proportional to 30,491.88, 42,092.04 and 18,558.96 is: 25,619.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,491.88 : 42,092.04 = 18,558.96 : x
  2. Step 2: Convert to fraction form
    30,491.88/42,092.04 = 18,558.96/x
  3. Step 3: Cross multiply
    30,491.88x = 42,092.04 × 18,558.96
  4. Step 4: Simplify right side
    30,491.88x = 781,184,486.68
  5. Step 5: Solve for x
    x = 781,184,486.68/30,491.88
  6. Step 6: Final answer
    x = 25,619.43

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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.