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Finding the Fourth Proportional to 18,078.76, 27,109.14 and 11,518.12

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Solution

The fourth proportional to 18,078.76, 27,109.14 and 11,518.12 is: 17,271.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,078.76 : 27,109.14 = 11,518.12 : x
  2. Step 2: Convert to fraction form
    18,078.76/27,109.14 = 11,518.12/x
  3. Step 3: Cross multiply
    18,078.76x = 27,109.14 × 11,518.12
  4. Step 4: Simplify right side
    18,078.76x = 312,246,327.62
  5. Step 5: Solve for x
    x = 312,246,327.62/18,078.76
  6. Step 6: Final answer
    x = 17,271.45

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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.