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Finding the Fourth Proportional to 7,892.40, 11,822.48 and 4,921.12

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Solution

The fourth proportional to 7,892.40, 11,822.48 and 4,921.12 is: 7,371.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,892.40 : 11,822.48 = 4,921.12 : x
  2. Step 2: Convert to fraction form
    7,892.40/11,822.48 = 4,921.12/x
  3. Step 3: Cross multiply
    7,892.40x = 11,822.48 × 4,921.12
  4. Step 4: Simplify right side
    7,892.40x = 58,179,842.78
  5. Step 5: Solve for x
    x = 58,179,842.78/7,892.40
  6. Step 6: Final answer
    x = 7,371.63

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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.