Home / 20,665.22-28,518.14-11,233.78

Finding the Fourth Proportional to 20,665.22, 28,518.14 and 11,233.78

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Solution

The fourth proportional to 20,665.22, 28,518.14 and 11,233.78 is: 15,502.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,665.22 : 28,518.14 = 11,233.78 : x
  2. Step 2: Convert to fraction form
    20,665.22/28,518.14 = 11,233.78/x
  3. Step 3: Cross multiply
    20,665.22x = 28,518.14 × 11,233.78
  4. Step 4: Simplify right side
    20,665.22x = 320,366,467.56
  5. Step 5: Solve for x
    x = 320,366,467.56/20,665.22
  6. Step 6: Final answer
    x = 15,502.69

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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.