Home / 20,305.85-28,020.92-11,230.68

Finding the Fourth Proportional to 20,305.85, 28,020.92 and 11,230.68

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Solution

The fourth proportional to 20,305.85, 28,020.92 and 11,230.68 is: 15,497.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,305.85 : 28,020.92 = 11,230.68 : x
  2. Step 2: Convert to fraction form
    20,305.85/28,020.92 = 11,230.68/x
  3. Step 3: Cross multiply
    20,305.85x = 28,020.92 × 11,230.68
  4. Step 4: Simplify right side
    20,305.85x = 314,693,929.67
  5. Step 5: Solve for x
    x = 314,693,929.67/20,305.85
  6. Step 6: Final answer
    x = 15,497.70

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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.