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Finding the Fourth Proportional to 8,668.49, 12,992.81 and 4,228.47

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Solution

The fourth proportional to 8,668.49, 12,992.81 and 4,228.47 is: 6,337.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,668.49 : 12,992.81 = 4,228.47 : x
  2. Step 2: Convert to fraction form
    8,668.49/12,992.81 = 4,228.47/x
  3. Step 3: Cross multiply
    8,668.49x = 12,992.81 × 4,228.47
  4. Step 4: Simplify right side
    8,668.49x = 54,939,686.16
  5. Step 5: Solve for x
    x = 54,939,686.16/8,668.49
  6. Step 6: Final answer
    x = 6,337.86

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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.