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Finding the Fourth Proportional to 7,777.22, 10,728.65 and 4,939.96

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Solution

The fourth proportional to 7,777.22, 10,728.65 and 4,939.96 is: 6,814.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,777.22 : 10,728.65 = 4,939.96 : x
  2. Step 2: Convert to fraction form
    7,777.22/10,728.65 = 4,939.96/x
  3. Step 3: Cross multiply
    7,777.22x = 10,728.65 × 4,939.96
  4. Step 4: Simplify right side
    7,777.22x = 52,999,101.85
  5. Step 5: Solve for x
    x = 52,999,101.85/7,777.22
  6. Step 6: Final answer
    x = 6,814.66

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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.