Home / 20,502.78-28,293.94-11,550.42

Finding the Fourth Proportional to 20,502.78, 28,293.94 and 11,550.42

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Solution

The fourth proportional to 20,502.78, 28,293.94 and 11,550.42 is: 15,939.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,502.78 : 28,293.94 = 11,550.42 : x
  2. Step 2: Convert to fraction form
    20,502.78/28,293.94 = 11,550.42/x
  3. Step 3: Cross multiply
    20,502.78x = 28,293.94 × 11,550.42
  4. Step 4: Simplify right side
    20,502.78x = 326,806,967.68
  5. Step 5: Solve for x
    x = 326,806,967.68/20,502.78
  6. Step 6: Final answer
    x = 15,939.64

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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.