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Finding the Fourth Proportional to 8,287.45, 12,429.45 and 2,739.49

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Solution

The fourth proportional to 8,287.45, 12,429.45 and 2,739.49 is: 4,108.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,287.45 : 12,429.45 = 2,739.49 : x
  2. Step 2: Convert to fraction form
    8,287.45/12,429.45 = 2,739.49/x
  3. Step 3: Cross multiply
    8,287.45x = 12,429.45 × 2,739.49
  4. Step 4: Simplify right side
    8,287.45x = 34,050,322.91
  5. Step 5: Solve for x
    x = 34,050,322.91/8,287.45
  6. Step 6: Final answer
    x = 4,108.66

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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.