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Finding the Fourth Proportional to 6,309.90, 8,707.60 and 3,621.00

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Solution

The fourth proportional to 6,309.90, 8,707.60 and 3,621.00 is: 4,996.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,309.90 : 8,707.60 = 3,621.00 : x
  2. Step 2: Convert to fraction form
    6,309.90/8,707.60 = 3,621.00/x
  3. Step 3: Cross multiply
    6,309.90x = 8,707.60 × 3,621.00
  4. Step 4: Simplify right side
    6,309.90x = 31,530,256.78
  5. Step 5: Solve for x
    x = 31,530,256.78/6,309.90
  6. Step 6: Final answer
    x = 4,996.95

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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.