Home / 20,352.72-28,086.59-11,400.31

Finding the Fourth Proportional to 20,352.72, 28,086.59 and 11,400.31

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Solution

The fourth proportional to 20,352.72, 28,086.59 and 11,400.31 is: 15,732.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,352.72 : 28,086.59 = 11,400.31 : x
  2. Step 2: Convert to fraction form
    20,352.72/28,086.59 = 11,400.31/x
  3. Step 3: Cross multiply
    20,352.72x = 28,086.59 × 11,400.31
  4. Step 4: Simplify right side
    20,352.72x = 320,195,635.41
  5. Step 5: Solve for x
    x = 320,195,635.41/20,352.72
  6. Step 6: Final answer
    x = 15,732.33

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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.