Home / 6,428.20-9,626.10-4,775.80

Finding the Fourth Proportional to 6,428.20, 9,626.10 and 4,775.80

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Solution

The fourth proportional to 6,428.20, 9,626.10 and 4,775.80 is: 7,151.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,428.20 : 9,626.10 = 4,775.80 : x
  2. Step 2: Convert to fraction form
    6,428.20/9,626.10 = 4,775.80/x
  3. Step 3: Cross multiply
    6,428.20x = 9,626.10 × 4,775.80
  4. Step 4: Simplify right side
    6,428.20x = 45,972,328.38
  5. Step 5: Solve for x
    x = 45,972,328.38/6,428.20
  6. Step 6: Final answer
    x = 7,151.66

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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.