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Finding the Fourth Proportional to 19,559.71, 26,987.88 and 13,198.11

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Solution

The fourth proportional to 19,559.71, 26,987.88 and 13,198.11 is: 18,210.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,559.71 : 26,987.88 = 13,198.11 : x
  2. Step 2: Convert to fraction form
    19,559.71/26,987.88 = 13,198.11/x
  3. Step 3: Cross multiply
    19,559.71x = 26,987.88 × 13,198.11
  4. Step 4: Simplify right side
    19,559.71x = 356,188,957.20
  5. Step 5: Solve for x
    x = 356,188,957.20/19,559.71
  6. Step 6: Final answer
    x = 18,210.34

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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.