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Finding the Fourth Proportional to 8,883.78, 12,311.47 and 8,758.50

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Solution

The fourth proportional to 8,883.78, 12,311.47 and 8,758.50 is: 12,137.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,883.78 : 12,311.47 = 8,758.50 : x
  2. Step 2: Convert to fraction form
    8,883.78/12,311.47 = 8,758.50/x
  3. Step 3: Cross multiply
    8,883.78x = 12,311.47 × 8,758.50
  4. Step 4: Simplify right side
    8,883.78x = 107,830,010.00
  5. Step 5: Solve for x
    x = 107,830,010.00/8,883.78
  6. Step 6: Final answer
    x = 12,137.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.