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Finding the Fourth Proportional to 8,665.93, 12,991.53 and 3,668.09

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Solution

The fourth proportional to 8,665.93, 12,991.53 and 3,668.09 is: 5,499.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,665.93 : 12,991.53 = 3,668.09 : x
  2. Step 2: Convert to fraction form
    8,665.93/12,991.53 = 3,668.09/x
  3. Step 3: Cross multiply
    8,665.93x = 12,991.53 × 3,668.09
  4. Step 4: Simplify right side
    8,665.93x = 47,654,133.76
  5. Step 5: Solve for x
    x = 47,654,133.76/8,665.93
  6. Step 6: Final answer
    x = 5,499.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.