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Finding the Fourth Proportional to 12,668.30, 17,487.19 and 11,339.70

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Solution

The fourth proportional to 12,668.30, 17,487.19 and 11,339.70 is: 15,653.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,668.30 : 17,487.19 = 11,339.70 : x
  2. Step 2: Convert to fraction form
    12,668.30/17,487.19 = 11,339.70/x
  3. Step 3: Cross multiply
    12,668.30x = 17,487.19 × 11,339.70
  4. Step 4: Simplify right side
    12,668.30x = 198,299,488.44
  5. Step 5: Solve for x
    x = 198,299,488.44/12,668.30
  6. Step 6: Final answer
    x = 15,653.20

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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.