Home / 8,936.74-12,321.35-6,387.57

Finding the Fourth Proportional to 8,936.74, 12,321.35 and 6,387.57

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Solution

The fourth proportional to 8,936.74, 12,321.35 and 6,387.57 is: 8,806.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,936.74 : 12,321.35 = 6,387.57 : x
  2. Step 2: Convert to fraction form
    8,936.74/12,321.35 = 6,387.57/x
  3. Step 3: Cross multiply
    8,936.74x = 12,321.35 × 6,387.57
  4. Step 4: Simplify right side
    8,936.74x = 78,703,477.64
  5. Step 5: Solve for x
    x = 78,703,477.64/8,936.74
  6. Step 6: Final answer
    x = 8,806.73

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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.