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Finding the Fourth Proportional to 8,159, 11,265.90 and 6,399.68

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Solution

The fourth proportional to 8,159, 11,265.90 and 6,399.68 is: 8,836.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,159 : 11,265.90 = 6,399.68 : x
  2. Step 2: Convert to fraction form
    8,159/11,265.90 = 6,399.68/x
  3. Step 3: Cross multiply
    8,159x = 11,265.90 × 6,399.68
  4. Step 4: Simplify right side
    8,159x = 72,098,154.91
  5. Step 5: Solve for x
    x = 72,098,154.91/8,159
  6. Step 6: Final answer
    x = 8,836.64

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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.