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Finding the Fourth Proportional to 18,693.90, 28,056.15 and 18,548.10

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Solution

The fourth proportional to 18,693.90, 28,056.15 and 18,548.10 is: 27,837.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,693.90 : 28,056.15 = 18,548.10 : x
  2. Step 2: Convert to fraction form
    18,693.90/28,056.15 = 18,548.10/x
  3. Step 3: Cross multiply
    18,693.90x = 28,056.15 × 18,548.10
  4. Step 4: Simplify right side
    18,693.90x = 520,388,275.82
  5. Step 5: Solve for x
    x = 520,388,275.82/18,693.90
  6. Step 6: Final answer
    x = 27,837.33

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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.