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Finding the Fourth Proportional to 18,390.19, 27,581.18 and 8,528.19

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Solution

The fourth proportional to 18,390.19, 27,581.18 and 8,528.19 is: 12,790.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,390.19 : 27,581.18 = 8,528.19 : x
  2. Step 2: Convert to fraction form
    18,390.19/27,581.18 = 8,528.19/x
  3. Step 3: Cross multiply
    18,390.19x = 27,581.18 × 8,528.19
  4. Step 4: Simplify right side
    18,390.19x = 235,217,384.24
  5. Step 5: Solve for x
    x = 235,217,384.24/18,390.19
  6. Step 6: Final answer
    x = 12,790.37

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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.