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Finding the Fourth Proportional to 11,481.60, 15,840.72 and 7,292.28

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Solution

The fourth proportional to 11,481.60, 15,840.72 and 7,292.28 is: 10,060.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,481.60 : 15,840.72 = 7,292.28 : x
  2. Step 2: Convert to fraction form
    11,481.60/15,840.72 = 7,292.28/x
  3. Step 3: Cross multiply
    11,481.60x = 15,840.72 × 7,292.28
  4. Step 4: Simplify right side
    11,481.60x = 115,514,965.64
  5. Step 5: Solve for x
    x = 115,514,965.64/11,481.60
  6. Step 6: Final answer
    x = 10,060.88

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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.