Home / 7,770.08-11,661.28-3,390.62

Finding the Fourth Proportional to 7,770.08, 11,661.28 and 3,390.62

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Solution

The fourth proportional to 7,770.08, 11,661.28 and 3,390.62 is: 5,088.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,770.08 : 11,661.28 = 3,390.62 : x
  2. Step 2: Convert to fraction form
    7,770.08/11,661.28 = 3,390.62/x
  3. Step 3: Cross multiply
    7,770.08x = 11,661.28 × 3,390.62
  4. Step 4: Simplify right side
    7,770.08x = 39,538,902.41
  5. Step 5: Solve for x
    x = 39,538,902.41/7,770.08
  6. Step 6: Final answer
    x = 5,088.61

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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.