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Finding the Fourth Proportional to 8,305.40, 12,455.40 and 2,757.80

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Solution

The fourth proportional to 8,305.40, 12,455.40 and 2,757.80 is: 4,135.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,305.40 : 12,455.40 = 2,757.80 : x
  2. Step 2: Convert to fraction form
    8,305.40/12,455.40 = 2,757.80/x
  3. Step 3: Cross multiply
    8,305.40x = 12,455.40 × 2,757.80
  4. Step 4: Simplify right side
    8,305.40x = 34,349,502.12
  5. Step 5: Solve for x
    x = 34,349,502.12/8,305.40
  6. Step 6: Final answer
    x = 4,135.80

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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.