Home / 20,853.79-28,778.05-11,293.69

Finding the Fourth Proportional to 20,853.79, 28,778.05 and 11,293.69

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Solution

The fourth proportional to 20,853.79, 28,778.05 and 11,293.69 is: 15,585.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,853.79 : 28,778.05 = 11,293.69 : x
  2. Step 2: Convert to fraction form
    20,853.79/28,778.05 = 11,293.69/x
  3. Step 3: Cross multiply
    20,853.79x = 28,778.05 × 11,293.69
  4. Step 4: Simplify right side
    20,853.79x = 325,010,375.50
  5. Step 5: Solve for x
    x = 325,010,375.50/20,853.79
  6. Step 6: Final answer
    x = 15,585.19

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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.