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Finding the Fourth Proportional to 6,489.84, 8,954.64 and 4,131.12

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Solution

The fourth proportional to 6,489.84, 8,954.64 and 4,131.12 is: 5,700.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,489.84 : 8,954.64 = 4,131.12 : x
  2. Step 2: Convert to fraction form
    6,489.84/8,954.64 = 4,131.12/x
  3. Step 3: Cross multiply
    6,489.84x = 8,954.64 × 4,131.12
  4. Step 4: Simplify right side
    6,489.84x = 36,992,692.40
  5. Step 5: Solve for x
    x = 36,992,692.40/6,489.84
  6. Step 6: Final answer
    x = 5,700.09

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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.