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Finding the Fourth Proportional to 18,103.54, 27,138.58 and 12,559.50

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Solution

The fourth proportional to 18,103.54, 27,138.58 and 12,559.50 is: 18,827.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,103.54 : 27,138.58 = 12,559.50 : x
  2. Step 2: Convert to fraction form
    18,103.54/27,138.58 = 12,559.50/x
  3. Step 3: Cross multiply
    18,103.54x = 27,138.58 × 12,559.50
  4. Step 4: Simplify right side
    18,103.54x = 340,846,995.51
  5. Step 5: Solve for x
    x = 340,846,995.51/18,103.54
  6. Step 6: Final answer
    x = 18,827.64

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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.