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Finding the Fourth Proportional to 20,439.97, 30,616.86 and 9,355.97

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Solution

The fourth proportional to 20,439.97, 30,616.86 and 9,355.97 is: 14,014.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,439.97 : 30,616.86 = 9,355.97 : x
  2. Step 2: Convert to fraction form
    20,439.97/30,616.86 = 9,355.97/x
  3. Step 3: Cross multiply
    20,439.97x = 30,616.86 × 9,355.97
  4. Step 4: Simplify right side
    20,439.97x = 286,450,535.28
  5. Step 5: Solve for x
    x = 286,450,535.28/20,439.97
  6. Step 6: Final answer
    x = 14,014.24

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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.