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Finding the Fourth Proportional to 18,978,171.26, 26,189,911.96 and 10,605,541.08

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Solution

The fourth proportional to 18,978,171.26, 26,189,911.96 and 10,605,541.08 is: 14,635,666.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,978,171.26 : 26,189,911.96 = 10,605,541.08 : x
  2. Step 2: Convert to fraction form
    18,978,171.26/26,189,911.96 = 10,605,541.08/x
  3. Step 3: Cross multiply
    18,978,171.26x = 26,189,911.96 × 10,605,541.08
  4. Step 4: Simplify right side
    18,978,171.26x = 277,758,187,173,363.34
  5. Step 5: Solve for x
    x = 277,758,187,173,363.34/18,978,171.26
  6. Step 6: Final answer
    x = 14,635,666.60

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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.