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Finding the Fourth Proportional to 8,505.78, 12,762.99 and 4,401.78

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Solution

The fourth proportional to 8,505.78, 12,762.99 and 4,401.78 is: 6,604.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,505.78 : 12,762.99 = 4,401.78 : x
  2. Step 2: Convert to fraction form
    8,505.78/12,762.99 = 4,401.78/x
  3. Step 3: Cross multiply
    8,505.78x = 12,762.99 × 4,401.78
  4. Step 4: Simplify right side
    8,505.78x = 56,179,874.12
  5. Step 5: Solve for x
    x = 56,179,874.12/8,505.78
  6. Step 6: Final answer
    x = 6,604.91

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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.