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Finding the Fourth Proportional to 8,968.94, 12,351.43 and 8,939.74

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Solution

The fourth proportional to 8,968.94, 12,351.43 and 8,939.74 is: 12,311.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,968.94 : 12,351.43 = 8,939.74 : x
  2. Step 2: Convert to fraction form
    8,968.94/12,351.43 = 8,939.74/x
  3. Step 3: Cross multiply
    8,968.94x = 12,351.43 × 8,939.74
  4. Step 4: Simplify right side
    8,968.94x = 110,418,572.83
  5. Step 5: Solve for x
    x = 110,418,572.83/8,968.94
  6. Step 6: Final answer
    x = 12,311.22

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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.