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Finding the Fourth Proportional to 18,188.06, 25,106.13 and 11,478.06

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Solution

The fourth proportional to 18,188.06, 25,106.13 and 11,478.06 is: 15,843.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,188.06 : 25,106.13 = 11,478.06 : x
  2. Step 2: Convert to fraction form
    18,188.06/25,106.13 = 11,478.06/x
  3. Step 3: Cross multiply
    18,188.06x = 25,106.13 × 11,478.06
  4. Step 4: Simplify right side
    18,188.06x = 288,169,666.51
  5. Step 5: Solve for x
    x = 288,169,666.51/18,188.06
  6. Step 6: Final answer
    x = 15,843.90

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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.