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Finding the Fourth Proportional to 8,305.78, 12,457.23 and 2,149.78

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Solution

The fourth proportional to 8,305.78, 12,457.23 and 2,149.78 is: 3,224.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,305.78 : 12,457.23 = 2,149.78 : x
  2. Step 2: Convert to fraction form
    8,305.78/12,457.23 = 2,149.78/x
  3. Step 3: Cross multiply
    8,305.78x = 12,457.23 × 2,149.78
  4. Step 4: Simplify right side
    8,305.78x = 26,780,303.91
  5. Step 5: Solve for x
    x = 26,780,303.91/8,305.78
  6. Step 6: Final answer
    x = 3,224.30

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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.