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Finding the Fourth Proportional to 26,798.40, 40,187.30 and 12,747.60

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Solution

The fourth proportional to 26,798.40, 40,187.30 and 12,747.60 is: 19,116.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,798.40 : 40,187.30 = 12,747.60 : x
  2. Step 2: Convert to fraction form
    26,798.40/40,187.30 = 12,747.60/x
  3. Step 3: Cross multiply
    26,798.40x = 40,187.30 × 12,747.60
  4. Step 4: Simplify right side
    26,798.40x = 512,291,561.74
  5. Step 5: Solve for x
    x = 512,291,561.74/26,798.40
  6. Step 6: Final answer
    x = 19,116.50

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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.