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Finding the Fourth Proportional to 13,776.66, 19,011.79 and 8,187.66

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Solution

The fourth proportional to 13,776.66, 19,011.79 and 8,187.66 is: 11,298.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,776.66 : 19,011.79 = 8,187.66 : x
  2. Step 2: Convert to fraction form
    13,776.66/19,011.79 = 8,187.66/x
  3. Step 3: Cross multiply
    13,776.66x = 19,011.79 × 8,187.66
  4. Step 4: Simplify right side
    13,776.66x = 155,662,052.04
  5. Step 5: Solve for x
    x = 155,662,052.04/13,776.66
  6. Step 6: Final answer
    x = 11,298.97

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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.