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Finding the Fourth Proportional to 8,682.34, 12,960.65 and 7,631.41

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Solution

The fourth proportional to 8,682.34, 12,960.65 and 7,631.41 is: 11,391.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,682.34 : 12,960.65 = 7,631.41 : x
  2. Step 2: Convert to fraction form
    8,682.34/12,960.65 = 7,631.41/x
  3. Step 3: Cross multiply
    8,682.34x = 12,960.65 × 7,631.41
  4. Step 4: Simplify right side
    8,682.34x = 98,908,034.02
  5. Step 5: Solve for x
    x = 98,908,034.02/8,682.34
  6. Step 6: Final answer
    x = 11,391.86

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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.