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Finding the Fourth Proportional to 21,863.76, 32,795.64 and 5,447.76

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Solution

The fourth proportional to 21,863.76, 32,795.64 and 5,447.76 is: 8,171.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,863.76 : 32,795.64 = 5,447.76 : x
  2. Step 2: Convert to fraction form
    21,863.76/32,795.64 = 5,447.76/x
  3. Step 3: Cross multiply
    21,863.76x = 32,795.64 × 5,447.76
  4. Step 4: Simplify right side
    21,863.76x = 178,662,775.77
  5. Step 5: Solve for x
    x = 178,662,775.77/21,863.76
  6. Step 6: Final answer
    x = 8,171.64

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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.