Home / 18,820.56-28,195.20-12,561.69

Finding the Fourth Proportional to 18,820.56, 28,195.20 and 12,561.69

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Solution

The fourth proportional to 18,820.56, 28,195.20 and 12,561.69 is: 18,818.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,820.56 : 28,195.20 = 12,561.69 : x
  2. Step 2: Convert to fraction form
    18,820.56/28,195.20 = 12,561.69/x
  3. Step 3: Cross multiply
    18,820.56x = 28,195.20 × 12,561.69
  4. Step 4: Simplify right side
    18,820.56x = 354,179,361.89
  5. Step 5: Solve for x
    x = 354,179,361.89/18,820.56
  6. Step 6: Final answer
    x = 18,818.75

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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.