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Finding the Fourth Proportional to 12,333.12, 17,033.88 and 8,990.88

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Solution

The fourth proportional to 12,333.12, 17,033.88 and 8,990.88 is: 12,417.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,333.12 : 17,033.88 = 8,990.88 : x
  2. Step 2: Convert to fraction form
    12,333.12/17,033.88 = 8,990.88/x
  3. Step 3: Cross multiply
    12,333.12x = 17,033.88 × 8,990.88
  4. Step 4: Simplify right side
    12,333.12x = 153,149,571.01
  5. Step 5: Solve for x
    x = 153,149,571.01/12,333.12
  6. Step 6: Final answer
    x = 12,417.75

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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.