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Finding the Fourth Proportional to 8,604.06, 12,920.82 and 5,291.76

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Solution

The fourth proportional to 8,604.06, 12,920.82 and 5,291.76 is: 7,946.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,604.06 : 12,920.82 = 5,291.76 : x
  2. Step 2: Convert to fraction form
    8,604.06/12,920.82 = 5,291.76/x
  3. Step 3: Cross multiply
    8,604.06x = 12,920.82 × 5,291.76
  4. Step 4: Simplify right side
    8,604.06x = 68,373,878.44
  5. Step 5: Solve for x
    x = 68,373,878.44/8,604.06
  6. Step 6: Final answer
    x = 7,946.70

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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.