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Finding the Fourth Proportional to 18,637.94, 27,956.90 and 12,776.78

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Solution

The fourth proportional to 18,637.94, 27,956.90 and 12,776.78 is: 19,165.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,637.94 : 27,956.90 = 12,776.78 : x
  2. Step 2: Convert to fraction form
    18,637.94/27,956.90 = 12,776.78/x
  3. Step 3: Cross multiply
    18,637.94x = 27,956.90 × 12,776.78
  4. Step 4: Simplify right side
    18,637.94x = 357,198,957.11
  5. Step 5: Solve for x
    x = 357,198,957.11/18,637.94
  6. Step 6: Final answer
    x = 19,165.16

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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.