Home / 18,785.12-25,912.20-12,411.92

Finding the Fourth Proportional to 18,785.12, 25,912.20 and 12,411.92

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Solution

The fourth proportional to 18,785.12, 25,912.20 and 12,411.92 is: 17,121.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,785.12 : 25,912.20 = 12,411.92 : x
  2. Step 2: Convert to fraction form
    18,785.12/25,912.20 = 12,411.92/x
  3. Step 3: Cross multiply
    18,785.12x = 25,912.20 × 12,411.92
  4. Step 4: Simplify right side
    18,785.12x = 321,620,153.42
  5. Step 5: Solve for x
    x = 321,620,153.42/18,785.12
  6. Step 6: Final answer
    x = 17,121.01

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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.