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Finding the Fourth Proportional to 8,932.78, 13,320.46 and 8,309.44

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Solution

The fourth proportional to 8,932.78, 13,320.46 and 8,309.44 is: 12,390.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,932.78 : 13,320.46 = 8,309.44 : x
  2. Step 2: Convert to fraction form
    8,932.78/13,320.46 = 8,309.44/x
  3. Step 3: Cross multiply
    8,932.78x = 13,320.46 × 8,309.44
  4. Step 4: Simplify right side
    8,932.78x = 110,685,563.14
  5. Step 5: Solve for x
    x = 110,685,563.14/8,932.78
  6. Step 6: Final answer
    x = 12,390.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.