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Finding the Fourth Proportional to 21,843.76, 32,765.62 and 5,427.76

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Solution

The fourth proportional to 21,843.76, 32,765.62 and 5,427.76 is: 8,141.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,843.76 : 32,765.62 = 5,427.76 : x
  2. Step 2: Convert to fraction form
    21,843.76/32,765.62 = 5,427.76/x
  3. Step 3: Cross multiply
    21,843.76x = 32,765.62 × 5,427.76
  4. Step 4: Simplify right side
    21,843.76x = 177,843,921.61
  5. Step 5: Solve for x
    x = 177,843,921.61/21,843.76
  6. Step 6: Final answer
    x = 8,141.64

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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.