Home / 20,537.22-28,341.36-11,105.78

Finding the Fourth Proportional to 20,537.22, 28,341.36 and 11,105.78

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Solution

The fourth proportional to 20,537.22, 28,341.36 and 11,105.78 is: 15,325.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,537.22 : 28,341.36 = 11,105.78 : x
  2. Step 2: Convert to fraction form
    20,537.22/28,341.36 = 11,105.78/x
  3. Step 3: Cross multiply
    20,537.22x = 28,341.36 × 11,105.78
  4. Step 4: Simplify right side
    20,537.22x = 314,752,909.06
  5. Step 5: Solve for x
    x = 314,752,909.06/20,537.22
  6. Step 6: Final answer
    x = 15,325.97

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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.