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Finding the Fourth Proportional to 6,430.88, 8,872.99 and 3,777.77

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Solution

The fourth proportional to 6,430.88, 8,872.99 and 3,777.77 is: 5,212.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,430.88 : 8,872.99 = 3,777.77 : x
  2. Step 2: Convert to fraction form
    6,430.88/8,872.99 = 3,777.77/x
  3. Step 3: Cross multiply
    6,430.88x = 8,872.99 × 3,777.77
  4. Step 4: Simplify right side
    6,430.88x = 33,520,115.43
  5. Step 5: Solve for x
    x = 33,520,115.43/6,430.88
  6. Step 6: Final answer
    x = 5,212.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.