Home / 15,748.78-21,735.72-11,965.78

Finding the Fourth Proportional to 15,748.78, 21,735.72 and 11,965.78

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Solution

The fourth proportional to 15,748.78, 21,735.72 and 11,965.78 is: 16,514.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,748.78 : 21,735.72 = 11,965.78 : x
  2. Step 2: Convert to fraction form
    15,748.78/21,735.72 = 11,965.78/x
  3. Step 3: Cross multiply
    15,748.78x = 21,735.72 × 11,965.78
  4. Step 4: Simplify right side
    15,748.78x = 260,084,843.66
  5. Step 5: Solve for x
    x = 260,084,843.66/15,748.78
  6. Step 6: Final answer
    x = 16,514.60

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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.