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Finding the Fourth Proportional to 30,352.56, 41,821.56 and 20,399.28

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Solution

The fourth proportional to 30,352.56, 41,821.56 and 20,399.28 is: 28,107.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,352.56 : 41,821.56 = 20,399.28 : x
  2. Step 2: Convert to fraction form
    30,352.56/41,821.56 = 20,399.28/x
  3. Step 3: Cross multiply
    30,352.56x = 41,821.56 × 20,399.28
  4. Step 4: Simplify right side
    30,352.56x = 853,129,712.48
  5. Step 5: Solve for x
    x = 853,129,712.48/30,352.56
  6. Step 6: Final answer
    x = 28,107.34

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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.