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Finding the Fourth Proportional to 8,652.72, 12,965.64 and 6,920.88

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Solution

The fourth proportional to 8,652.72, 12,965.64 and 6,920.88 is: 10,370.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,652.72 : 12,965.64 = 6,920.88 : x
  2. Step 2: Convert to fraction form
    8,652.72/12,965.64 = 6,920.88/x
  3. Step 3: Cross multiply
    8,652.72x = 12,965.64 × 6,920.88
  4. Step 4: Simplify right side
    8,652.72x = 89,733,638.56
  5. Step 5: Solve for x
    x = 89,733,638.56/8,652.72
  6. Step 6: Final answer
    x = 10,370.57

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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.