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Finding the Fourth Proportional to 18,347.54, 25,327.35 and 12,387.28

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Solution

The fourth proportional to 18,347.54, 25,327.35 and 12,387.28 is: 17,099.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,347.54 : 25,327.35 = 12,387.28 : x
  2. Step 2: Convert to fraction form
    18,347.54/25,327.35 = 12,387.28/x
  3. Step 3: Cross multiply
    18,347.54x = 25,327.35 × 12,387.28
  4. Step 4: Simplify right side
    18,347.54x = 313,736,976.11
  5. Step 5: Solve for x
    x = 313,736,976.11/18,347.54
  6. Step 6: Final answer
    x = 17,099.68

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.