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Finding the Fourth Proportional to 30,645.80, 42,289.62 and 17,217.62

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Solution

The fourth proportional to 30,645.80, 42,289.62 and 17,217.62 is: 23,759.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,645.80 : 42,289.62 = 17,217.62 : x
  2. Step 2: Convert to fraction form
    30,645.80/42,289.62 = 17,217.62/x
  3. Step 3: Cross multiply
    30,645.80x = 42,289.62 × 17,217.62
  4. Step 4: Simplify right side
    30,645.80x = 728,126,607.10
  5. Step 5: Solve for x
    x = 728,126,607.10/30,645.80
  6. Step 6: Final answer
    x = 23,759.43

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Similar ratio
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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.