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Finding the Fourth Proportional to 12,668.52, 17,487.38 and 11,339.80

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Solution

The fourth proportional to 12,668.52, 17,487.38 and 11,339.80 is: 15,653.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,668.52 : 17,487.38 = 11,339.80 : x
  2. Step 2: Convert to fraction form
    12,668.52/17,487.38 = 11,339.80/x
  3. Step 3: Cross multiply
    12,668.52x = 17,487.38 × 11,339.80
  4. Step 4: Simplify right side
    12,668.52x = 198,303,391.72
  5. Step 5: Solve for x
    x = 198,303,391.72/12,668.52
  6. Step 6: Final answer
    x = 15,653.24

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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.