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Finding the Fourth Proportional to 6,420.04, 8,850.79 and 6,280.31

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Solution

The fourth proportional to 6,420.04, 8,850.79 and 6,280.31 is: 8,658.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,420.04 : 8,850.79 = 6,280.31 : x
  2. Step 2: Convert to fraction form
    6,420.04/8,850.79 = 6,280.31/x
  3. Step 3: Cross multiply
    6,420.04x = 8,850.79 × 6,280.31
  4. Step 4: Simplify right side
    6,420.04x = 55,585,704.94
  5. Step 5: Solve for x
    x = 55,585,704.94/6,420.04
  6. Step 6: Final answer
    x = 8,658.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.