Home / 20,078.40-30,122.76-6,930.84

Finding the Fourth Proportional to 20,078.40, 30,122.76 and 6,930.84

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Solution

The fourth proportional to 20,078.40, 30,122.76 and 6,930.84 is: 10,398.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,078.40 : 30,122.76 = 6,930.84 : x
  2. Step 2: Convert to fraction form
    20,078.40/30,122.76 = 6,930.84/x
  3. Step 3: Cross multiply
    20,078.40x = 30,122.76 × 6,930.84
  4. Step 4: Simplify right side
    20,078.40x = 208,776,029.92
  5. Step 5: Solve for x
    x = 208,776,029.92/20,078.40
  6. Step 6: Final answer
    x = 10,398.04

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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.