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Finding the Fourth Proportional to 21,262.82, 31,887.44 and 7,028.64

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Solution

The fourth proportional to 21,262.82, 31,887.44 and 7,028.64 is: 10,540.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,262.82 : 31,887.44 = 7,028.64 : x
  2. Step 2: Convert to fraction form
    21,262.82/31,887.44 = 7,028.64/x
  3. Step 3: Cross multiply
    21,262.82x = 31,887.44 × 7,028.64
  4. Step 4: Simplify right side
    21,262.82x = 224,125,336.28
  5. Step 5: Solve for x
    x = 224,125,336.28/21,262.82
  6. Step 6: Final answer
    x = 10,540.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.