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Finding the Fourth Proportional to 8,847.78, 12,211.90 and 6,929.78

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Solution

The fourth proportional to 8,847.78, 12,211.90 and 6,929.78 is: 9,564.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,847.78 : 12,211.90 = 6,929.78 : x
  2. Step 2: Convert to fraction form
    8,847.78/12,211.90 = 6,929.78/x
  3. Step 3: Cross multiply
    8,847.78x = 12,211.90 × 6,929.78
  4. Step 4: Simplify right side
    8,847.78x = 84,625,780.38
  5. Step 5: Solve for x
    x = 84,625,780.38/8,847.78
  6. Step 6: Final answer
    x = 9,564.63

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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.