Home / 8,120.28-11,215.08-6,349.35

Finding the Fourth Proportional to 8,120.28, 11,215.08 and 6,349.35

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Solution

The fourth proportional to 8,120.28, 11,215.08 and 6,349.35 is: 8,769.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,120.28 : 11,215.08 = 6,349.35 : x
  2. Step 2: Convert to fraction form
    8,120.28/11,215.08 = 6,349.35/x
  3. Step 3: Cross multiply
    8,120.28x = 11,215.08 × 6,349.35
  4. Step 4: Simplify right side
    8,120.28x = 71,208,468.20
  5. Step 5: Solve for x
    x = 71,208,468.20/8,120.28
  6. Step 6: Final answer
    x = 8,769.21

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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.