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Finding the Fourth Proportional to 18,155.51, 27,209.72 and 8,152.87

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Solution

The fourth proportional to 18,155.51, 27,209.72 and 8,152.87 is: 12,218.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,155.51 : 27,209.72 = 8,152.87 : x
  2. Step 2: Convert to fraction form
    18,155.51/27,209.72 = 8,152.87/x
  3. Step 3: Cross multiply
    18,155.51x = 27,209.72 × 8,152.87
  4. Step 4: Simplify right side
    18,155.51x = 221,837,309.90
  5. Step 5: Solve for x
    x = 221,837,309.90/18,155.51
  6. Step 6: Final answer
    x = 12,218.73

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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.