Home / 8,936.10-12,320.46-6,386.88

Finding the Fourth Proportional to 8,936.10, 12,320.46 and 6,386.88

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Solution

The fourth proportional to 8,936.10, 12,320.46 and 6,386.88 is: 8,805.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,936.10 : 12,320.46 = 6,386.88 : x
  2. Step 2: Convert to fraction form
    8,936.10/12,320.46 = 6,386.88/x
  3. Step 3: Cross multiply
    8,936.10x = 12,320.46 × 6,386.88
  4. Step 4: Simplify right side
    8,936.10x = 78,689,299.56
  5. Step 5: Solve for x
    x = 78,689,299.56/8,936.10
  6. Step 6: Final answer
    x = 8,805.78

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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.