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Finding the Fourth Proportional to 8,989.44, 12,379.68 and 8,960.28

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Solution

The fourth proportional to 8,989.44, 12,379.68 and 8,960.28 is: 12,339.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,989.44 : 12,379.68 = 8,960.28 : x
  2. Step 2: Convert to fraction form
    8,989.44/12,379.68 = 8,960.28/x
  3. Step 3: Cross multiply
    8,989.44x = 12,379.68 × 8,960.28
  4. Step 4: Simplify right side
    8,989.44x = 110,925,399.11
  5. Step 5: Solve for x
    x = 110,925,399.11/8,989.44
  6. Step 6: Final answer
    x = 12,339.52

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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.