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Finding the Fourth Proportional to 15,687.52, 21,668.08 and 11,726.32

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Solution

The fourth proportional to 15,687.52, 21,668.08 and 11,726.32 is: 16,196.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,687.52 : 21,668.08 = 11,726.32 : x
  2. Step 2: Convert to fraction form
    15,687.52/21,668.08 = 11,726.32/x
  3. Step 3: Cross multiply
    15,687.52x = 21,668.08 × 11,726.32
  4. Step 4: Simplify right side
    15,687.52x = 254,086,851.97
  5. Step 5: Solve for x
    x = 254,086,851.97/15,687.52
  6. Step 6: Final answer
    x = 16,196.75

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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.