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Finding the Fourth Proportional to 21,867.76, 32,801.64 and 5,451.76

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Solution

The fourth proportional to 21,867.76, 32,801.64 and 5,451.76 is: 8,177.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,867.76 : 32,801.64 = 5,451.76 : x
  2. Step 2: Convert to fraction form
    21,867.76/32,801.64 = 5,451.76/x
  3. Step 3: Cross multiply
    21,867.76x = 32,801.64 × 5,451.76
  4. Step 4: Simplify right side
    21,867.76x = 178,826,668.89
  5. Step 5: Solve for x
    x = 178,826,668.89/21,867.76
  6. Step 6: Final answer
    x = 8,177.64

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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.