Home / 6,406.20-9,620.10-6,211.80

Finding the Fourth Proportional to 6,406.20, 9,620.10 and 6,211.80

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Solution

The fourth proportional to 6,406.20, 9,620.10 and 6,211.80 is: 9,328.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,406.20 : 9,620.10 = 6,211.80 : x
  2. Step 2: Convert to fraction form
    6,406.20/9,620.10 = 6,211.80/x
  3. Step 3: Cross multiply
    6,406.20x = 9,620.10 × 6,211.80
  4. Step 4: Simplify right side
    6,406.20x = 59,758,137.18
  5. Step 5: Solve for x
    x = 59,758,137.18/6,406.20
  6. Step 6: Final answer
    x = 9,328.17

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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.