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Finding the Fourth Proportional to 8,960.94, 12,356.10 and 6,128.78

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Solution

The fourth proportional to 8,960.94, 12,356.10 and 6,128.78 is: 8,450.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,960.94 : 12,356.10 = 6,128.78 : x
  2. Step 2: Convert to fraction form
    8,960.94/12,356.10 = 6,128.78/x
  3. Step 3: Cross multiply
    8,960.94x = 12,356.10 × 6,128.78
  4. Step 4: Simplify right side
    8,960.94x = 75,727,756.78
  5. Step 5: Solve for x
    x = 75,727,756.78/8,960.94
  6. Step 6: Final answer
    x = 8,450.87

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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.