Home / 8,620.74-12,930.75-4,872.78

Finding the Fourth Proportional to 8,620.74, 12,930.75 and 4,872.78

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Solution

The fourth proportional to 8,620.74, 12,930.75 and 4,872.78 is: 7,308.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,620.74 : 12,930.75 = 4,872.78 : x
  2. Step 2: Convert to fraction form
    8,620.74/12,930.75 = 4,872.78/x
  3. Step 3: Cross multiply
    8,620.74x = 12,930.75 × 4,872.78
  4. Step 4: Simplify right side
    8,620.74x = 63,008,699.99
  5. Step 5: Solve for x
    x = 63,008,699.99/8,620.74
  6. Step 6: Final answer
    x = 7,308.97

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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.