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Finding the Fourth Proportional to 8,472.88, 11,680.20 and 5,947.36

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Solution

The fourth proportional to 8,472.88, 11,680.20 and 5,947.36 is: 8,198.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,472.88 : 11,680.20 = 5,947.36 : x
  2. Step 2: Convert to fraction form
    8,472.88/11,680.20 = 5,947.36/x
  3. Step 3: Cross multiply
    8,472.88x = 11,680.20 × 5,947.36
  4. Step 4: Simplify right side
    8,472.88x = 69,466,354.27
  5. Step 5: Solve for x
    x = 69,466,354.27/8,472.88
  6. Step 6: Final answer
    x = 8,198.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.