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Finding the Fourth Proportional to 8,215.28, 11,337 and 4,489.28

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Solution

The fourth proportional to 8,215.28, 11,337 and 4,489.28 is: 6,195.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,215.28 : 11,337 = 4,489.28 : x
  2. Step 2: Convert to fraction form
    8,215.28/11,337 = 4,489.28/x
  3. Step 3: Cross multiply
    8,215.28x = 11,337 × 4,489.28
  4. Step 4: Simplify right side
    8,215.28x = 50,894,967.36
  5. Step 5: Solve for x
    x = 50,894,967.36/8,215.28
  6. Step 6: Final answer
    x = 6,195.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.