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Finding the Fourth Proportional to 7,778.88, 11,669.58 and 3,098.88

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Solution

The fourth proportional to 7,778.88, 11,669.58 and 3,098.88 is: 4,648.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,778.88 : 11,669.58 = 3,098.88 : x
  2. Step 2: Convert to fraction form
    7,778.88/11,669.58 = 3,098.88/x
  3. Step 3: Cross multiply
    7,778.88x = 11,669.58 × 3,098.88
  4. Step 4: Simplify right side
    7,778.88x = 36,162,628.07
  5. Step 5: Solve for x
    x = 36,162,628.07/7,778.88
  6. Step 6: Final answer
    x = 4,648.82

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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.