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Finding the Fourth Proportional to 8,755.15, 12,081.64 and 4,977.80

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Solution

The fourth proportional to 8,755.15, 12,081.64 and 4,977.80 is: 6,869.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,755.15 : 12,081.64 = 4,977.80 : x
  2. Step 2: Convert to fraction form
    8,755.15/12,081.64 = 4,977.80/x
  3. Step 3: Cross multiply
    8,755.15x = 12,081.64 × 4,977.80
  4. Step 4: Simplify right side
    8,755.15x = 60,139,944.94
  5. Step 5: Solve for x
    x = 60,139,944.94/8,755.15
  6. Step 6: Final answer
    x = 6,869.09

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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.