Home / 8,279.88-11,430.46-6,387.21

Finding the Fourth Proportional to 8,279.88, 11,430.46 and 6,387.21

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Solution

The fourth proportional to 8,279.88, 11,430.46 and 6,387.21 is: 8,817.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,279.88 : 11,430.46 = 6,387.21 : x
  2. Step 2: Convert to fraction form
    8,279.88/11,430.46 = 6,387.21/x
  3. Step 3: Cross multiply
    8,279.88x = 11,430.46 × 6,387.21
  4. Step 4: Simplify right side
    8,279.88x = 73,008,748.42
  5. Step 5: Solve for x
    x = 73,008,748.42/8,279.88
  6. Step 6: Final answer
    x = 8,817.61

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Find fourth proportional to 8,280.88, 11,431.84 and 6,388.21
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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.