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Finding the Fourth Proportional to 8,658.91, 11,941.45 and 5,673.66

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Solution

The fourth proportional to 8,658.91, 11,941.45 and 5,673.66 is: 7,824.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,658.91 : 11,941.45 = 5,673.66 : x
  2. Step 2: Convert to fraction form
    8,658.91/11,941.45 = 5,673.66/x
  3. Step 3: Cross multiply
    8,658.91x = 11,941.45 × 5,673.66
  4. Step 4: Simplify right side
    8,658.91x = 67,751,727.21
  5. Step 5: Solve for x
    x = 67,751,727.21/8,658.91
  6. Step 6: Final answer
    x = 7,824.51

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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.