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Finding the Fourth Proportional to 30,195.56, 45,278.70 and 12,660.68

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Solution

The fourth proportional to 30,195.56, 45,278.70 and 12,660.68 is: 18,984.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,195.56 : 45,278.70 = 12,660.68 : x
  2. Step 2: Convert to fraction form
    30,195.56/45,278.70 = 12,660.68/x
  3. Step 3: Cross multiply
    30,195.56x = 45,278.70 × 12,660.68
  4. Step 4: Simplify right side
    30,195.56x = 573,259,131.52
  5. Step 5: Solve for x
    x = 573,259,131.52/30,195.56
  6. Step 6: Final answer
    x = 18,984.88

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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.