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Finding the Fourth Proportional to 30,191.54, 45,241.13 and 12,651.80

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Solution

The fourth proportional to 30,191.54, 45,241.13 and 12,651.80 is: 18,958.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,191.54 : 45,241.13 = 12,651.80 : x
  2. Step 2: Convert to fraction form
    30,191.54/45,241.13 = 12,651.80/x
  3. Step 3: Cross multiply
    30,191.54x = 45,241.13 × 12,651.80
  4. Step 4: Simplify right side
    30,191.54x = 572,381,533.96
  5. Step 5: Solve for x
    x = 572,381,533.96/30,191.54
  6. Step 6: Final answer
    x = 18,958.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.