Home / 20,189.86-30,210.98-11,873.79

Finding the Fourth Proportional to 20,189.86, 30,210.98 and 11,873.79

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Solution

The fourth proportional to 20,189.86, 30,210.98 and 11,873.79 is: 17,767.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,189.86 : 30,210.98 = 11,873.79 : x
  2. Step 2: Convert to fraction form
    20,189.86/30,210.98 = 11,873.79/x
  3. Step 3: Cross multiply
    20,189.86x = 30,210.98 × 11,873.79
  4. Step 4: Simplify right side
    20,189.86x = 358,718,772.85
  5. Step 5: Solve for x
    x = 358,718,772.85/20,189.86
  6. Step 6: Final answer
    x = 17,767.28

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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.