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Finding the Fourth Proportional to 6,420.63, 8,861.63 and 3,732.21

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Solution

The fourth proportional to 6,420.63, 8,861.63 and 3,732.21 is: 5,151.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,420.63 : 8,861.63 = 3,732.21 : x
  2. Step 2: Convert to fraction form
    6,420.63/8,861.63 = 3,732.21/x
  3. Step 3: Cross multiply
    6,420.63x = 8,861.63 × 3,732.21
  4. Step 4: Simplify right side
    6,420.63x = 33,073,506.66
  5. Step 5: Solve for x
    x = 33,073,506.66/6,420.63
  6. Step 6: Final answer
    x = 5,151.13

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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.