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Finding the Fourth Proportional to 12,476.84, 18,720.72 and 6,626.61

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Solution

The fourth proportional to 12,476.84, 18,720.72 and 6,626.61 is: 9,942.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,476.84 : 18,720.72 = 6,626.61 : x
  2. Step 2: Convert to fraction form
    12,476.84/18,720.72 = 6,626.61/x
  3. Step 3: Cross multiply
    12,476.84x = 18,720.72 × 6,626.61
  4. Step 4: Simplify right side
    12,476.84x = 124,054,910.36
  5. Step 5: Solve for x
    x = 124,054,910.36/12,476.84
  6. Step 6: Final answer
    x = 9,942.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.