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Finding the Fourth Proportional to 19,868.81, 27,443.21 and 14,855.29

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Solution

The fourth proportional to 19,868.81, 27,443.21 and 14,855.29 is: 20,518.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,868.81 : 27,443.21 = 14,855.29 : x
  2. Step 2: Convert to fraction form
    19,868.81/27,443.21 = 14,855.29/x
  3. Step 3: Cross multiply
    19,868.81x = 27,443.21 × 14,855.29
  4. Step 4: Simplify right side
    19,868.81x = 407,676,700.20
  5. Step 5: Solve for x
    x = 407,676,700.20/19,868.81
  6. Step 6: Final answer
    x = 20,518.43

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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.