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Finding the Fourth Proportional to 20,465.39, 30,698.09 and 5,674.31

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Solution

The fourth proportional to 20,465.39, 30,698.09 and 5,674.31 is: 8,511.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,465.39 : 30,698.09 = 5,674.31 : x
  2. Step 2: Convert to fraction form
    20,465.39/30,698.09 = 5,674.31/x
  3. Step 3: Cross multiply
    20,465.39x = 30,698.09 × 5,674.31
  4. Step 4: Simplify right side
    20,465.39x = 174,190,570.00
  5. Step 5: Solve for x
    x = 174,190,570.00/20,465.39
  6. Step 6: Final answer
    x = 8,511.47

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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.