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Finding the Fourth Proportional to 12,776.94, 17,634.66 and 7,187.94

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Solution

The fourth proportional to 12,776.94, 17,634.66 and 7,187.94 is: 9,920.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,776.94 : 17,634.66 = 7,187.94 : x
  2. Step 2: Convert to fraction form
    12,776.94/17,634.66 = 7,187.94/x
  3. Step 3: Cross multiply
    12,776.94x = 17,634.66 × 7,187.94
  4. Step 4: Simplify right side
    12,776.94x = 126,756,878.00
  5. Step 5: Solve for x
    x = 126,756,878.00/12,776.94
  6. Step 6: Final answer
    x = 9,920.75

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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.