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Finding the Fourth Proportional to 18,904.13, 28,360.88 and 7,814.01

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Solution

The fourth proportional to 18,904.13, 28,360.88 and 7,814.01 is: 11,722.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,904.13 : 28,360.88 = 7,814.01 : x
  2. Step 2: Convert to fraction form
    18,904.13/28,360.88 = 7,814.01/x
  3. Step 3: Cross multiply
    18,904.13x = 28,360.88 × 7,814.01
  4. Step 4: Simplify right side
    18,904.13x = 221,612,219.46
  5. Step 5: Solve for x
    x = 221,612,219.46/18,904.13
  6. Step 6: Final answer
    x = 11,722.96

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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.