Home / 20,436.68-28,203.12-11,483.65

Finding the Fourth Proportional to 20,436.68, 28,203.12 and 11,483.65

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Solution

The fourth proportional to 20,436.68, 28,203.12 and 11,483.65 is: 15,847.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,436.68 : 28,203.12 = 11,483.65 : x
  2. Step 2: Convert to fraction form
    20,436.68/28,203.12 = 11,483.65/x
  3. Step 3: Cross multiply
    20,436.68x = 28,203.12 × 11,483.65
  4. Step 4: Simplify right side
    20,436.68x = 323,874,617.97
  5. Step 5: Solve for x
    x = 323,874,617.97/20,436.68
  6. Step 6: Final answer
    x = 15,847.71

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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.