Home / 8,612.20-12,849.40-7,676.68

Finding the Fourth Proportional to 8,612.20, 12,849.40 and 7,676.68

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Solution

The fourth proportional to 8,612.20, 12,849.40 and 7,676.68 is: 11,453.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,612.20 : 12,849.40 = 7,676.68 : x
  2. Step 2: Convert to fraction form
    8,612.20/12,849.40 = 7,676.68/x
  3. Step 3: Cross multiply
    8,612.20x = 12,849.40 × 7,676.68
  4. Step 4: Simplify right side
    8,612.20x = 98,640,731.99
  5. Step 5: Solve for x
    x = 98,640,731.99/8,612.20
  6. Step 6: Final answer
    x = 11,453.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.