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Finding the Fourth Proportional to 30,672.92, 45,990.80 and 20,007.25

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Solution

The fourth proportional to 30,672.92, 45,990.80 and 20,007.25 is: 29,998.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,672.92 : 45,990.80 = 20,007.25 : x
  2. Step 2: Convert to fraction form
    30,672.92/45,990.80 = 20,007.25/x
  3. Step 3: Cross multiply
    30,672.92x = 45,990.80 × 20,007.25
  4. Step 4: Simplify right side
    30,672.92x = 920,149,218.29
  5. Step 5: Solve for x
    x = 920,149,218.29/30,672.92
  6. Step 6: Final answer
    x = 29,998.75

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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.