Home / 20,520.20-30,780.30-6,670.60

Finding the Fourth Proportional to 20,520.20, 30,780.30 and 6,670.60

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Solution

The fourth proportional to 20,520.20, 30,780.30 and 6,670.60 is: 10,005.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,520.20 : 30,780.30 = 6,670.60 : x
  2. Step 2: Convert to fraction form
    20,520.20/30,780.30 = 6,670.60/x
  3. Step 3: Cross multiply
    20,520.20x = 30,780.30 × 6,670.60
  4. Step 4: Simplify right side
    20,520.20x = 205,323,069.18
  5. Step 5: Solve for x
    x = 205,323,069.18/20,520.20
  6. Step 6: Final answer
    x = 10,005.90

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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.