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Finding the Fourth Proportional to 21,859.92, 32,791.92 and 8,709.24

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Solution

The fourth proportional to 21,859.92, 32,791.92 and 8,709.24 is: 13,064.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,859.92 : 32,791.92 = 8,709.24 : x
  2. Step 2: Convert to fraction form
    21,859.92/32,791.92 = 8,709.24/x
  3. Step 3: Cross multiply
    21,859.92x = 32,791.92 × 8,709.24
  4. Step 4: Simplify right side
    21,859.92x = 285,592,701.34
  5. Step 5: Solve for x
    x = 285,592,701.34/21,859.92
  6. Step 6: Final answer
    x = 13,064.67

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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.