Home / 20,446.10-30,687.15-12,115.70

Finding the Fourth Proportional to 20,446.10, 30,687.15 and 12,115.70

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Solution

The fourth proportional to 20,446.10, 30,687.15 and 12,115.70 is: 18,184.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,446.10 : 30,687.15 = 12,115.70 : x
  2. Step 2: Convert to fraction form
    20,446.10/30,687.15 = 12,115.70/x
  3. Step 3: Cross multiply
    20,446.10x = 30,687.15 × 12,115.70
  4. Step 4: Simplify right side
    20,446.10x = 371,796,303.26
  5. Step 5: Solve for x
    x = 371,796,303.26/20,446.10
  6. Step 6: Final answer
    x = 18,184.22

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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.