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Finding the Fourth Proportional to 7,670.40, 11,487.48 and 3,775.92

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Solution

The fourth proportional to 7,670.40, 11,487.48 and 3,775.92 is: 5,654.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,670.40 : 11,487.48 = 3,775.92 : x
  2. Step 2: Convert to fraction form
    7,670.40/11,487.48 = 3,775.92/x
  3. Step 3: Cross multiply
    7,670.40x = 11,487.48 × 3,775.92
  4. Step 4: Simplify right side
    7,670.40x = 43,375,805.48
  5. Step 5: Solve for x
    x = 43,375,805.48/7,670.40
  6. Step 6: Final answer
    x = 5,654.96

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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.