Home / 20,618.49-30,887.94-12,305.16

Finding the Fourth Proportional to 20,618.49, 30,887.94 and 12,305.16

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Solution

The fourth proportional to 20,618.49, 30,887.94 and 12,305.16 is: 18,433.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,618.49 : 30,887.94 = 12,305.16 : x
  2. Step 2: Convert to fraction form
    20,618.49/30,887.94 = 12,305.16/x
  3. Step 3: Cross multiply
    20,618.49x = 30,887.94 × 12,305.16
  4. Step 4: Simplify right side
    20,618.49x = 380,081,043.77
  5. Step 5: Solve for x
    x = 380,081,043.77/20,618.49
  6. Step 6: Final answer
    x = 18,433.99

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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.