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Finding the Fourth Proportional to 18,271.29, 27,390.45 and 8,405.49

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Solution

The fourth proportional to 18,271.29, 27,390.45 and 8,405.49 is: 12,600.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,271.29 : 27,390.45 = 8,405.49 : x
  2. Step 2: Convert to fraction form
    18,271.29/27,390.45 = 8,405.49/x
  3. Step 3: Cross multiply
    18,271.29x = 27,390.45 × 8,405.49
  4. Step 4: Simplify right side
    18,271.29x = 230,230,153.57
  5. Step 5: Solve for x
    x = 230,230,153.57/18,271.29
  6. Step 6: Final answer
    x = 12,600.65

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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.