Home / 20,434.40-30,651.60-8,122.40

Finding the Fourth Proportional to 20,434.40, 30,651.60 and 8,122.40

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Solution

The fourth proportional to 20,434.40, 30,651.60 and 8,122.40 is: 12,183.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,434.40 : 30,651.60 = 8,122.40 : x
  2. Step 2: Convert to fraction form
    20,434.40/30,651.60 = 8,122.40/x
  3. Step 3: Cross multiply
    20,434.40x = 30,651.60 × 8,122.40
  4. Step 4: Simplify right side
    20,434.40x = 248,964,555.84
  5. Step 5: Solve for x
    x = 248,964,555.84/20,434.40
  6. Step 6: Final answer
    x = 12,183.60

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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.