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Finding the Fourth Proportional to 20,346.88, 30,520.51 and 7,201.48

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Solution

The fourth proportional to 20,346.88, 30,520.51 and 7,201.48 is: 10,802.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,346.88 : 30,520.51 = 7,201.48 : x
  2. Step 2: Convert to fraction form
    20,346.88/30,520.51 = 7,201.48/x
  3. Step 3: Cross multiply
    20,346.88x = 30,520.51 × 7,201.48
  4. Step 4: Simplify right side
    20,346.88x = 219,792,653.74
  5. Step 5: Solve for x
    x = 219,792,653.74/20,346.88
  6. Step 6: Final answer
    x = 10,802.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.