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Finding the Fourth Proportional to 7,770.35, 11,655.65 and 1,926.96

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Solution

The fourth proportional to 7,770.35, 11,655.65 and 1,926.96 is: 2,890.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,770.35 : 11,655.65 = 1,926.96 : x
  2. Step 2: Convert to fraction form
    7,770.35/11,655.65 = 1,926.96/x
  3. Step 3: Cross multiply
    7,770.35x = 11,655.65 × 1,926.96
  4. Step 4: Simplify right side
    7,770.35x = 22,459,961.69
  5. Step 5: Solve for x
    x = 22,459,961.69/7,770.35
  6. Step 6: Final answer
    x = 2,890.47

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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.