Home / 20,403.09-28,158.30-12,450.65

Finding the Fourth Proportional to 20,403.09, 28,158.30 and 12,450.65

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Solution

The fourth proportional to 20,403.09, 28,158.30 and 12,450.65 is: 17,183.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,403.09 : 28,158.30 = 12,450.65 : x
  2. Step 2: Convert to fraction form
    20,403.09/28,158.30 = 12,450.65/x
  3. Step 3: Cross multiply
    20,403.09x = 28,158.30 × 12,450.65
  4. Step 4: Simplify right side
    20,403.09x = 350,588,997.10
  5. Step 5: Solve for x
    x = 350,588,997.10/20,403.09
  6. Step 6: Final answer
    x = 17,183.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.