Home / 8,310.40-11,469.76-6,317.76

Finding the Fourth Proportional to 8,310.40, 11,469.76 and 6,317.76

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Solution

The fourth proportional to 8,310.40, 11,469.76 and 6,317.76 is: 8,719.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,310.40 : 11,469.76 = 6,317.76 : x
  2. Step 2: Convert to fraction form
    8,310.40/11,469.76 = 6,317.76/x
  3. Step 3: Cross multiply
    8,310.40x = 11,469.76 × 6,317.76
  4. Step 4: Simplify right side
    8,310.40x = 72,463,190.94
  5. Step 5: Solve for x
    x = 72,463,190.94/8,310.40
  6. Step 6: Final answer
    x = 8,719.58

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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.