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Finding the Fourth Proportional to 8,793.72, 12,133.26 and 6,431.76

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Solution

The fourth proportional to 8,793.72, 12,133.26 and 6,431.76 is: 8,874.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,793.72 : 12,133.26 = 6,431.76 : x
  2. Step 2: Convert to fraction form
    8,793.72/12,133.26 = 6,431.76/x
  3. Step 3: Cross multiply
    8,793.72x = 12,133.26 × 6,431.76
  4. Step 4: Simplify right side
    8,793.72x = 78,038,216.34
  5. Step 5: Solve for x
    x = 78,038,216.34/8,793.72
  6. Step 6: Final answer
    x = 8,874.31

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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.