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Finding the Fourth Proportional to 20,445.94, 30,672.24 and 7,294.78

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Solution

The fourth proportional to 20,445.94, 30,672.24 and 7,294.78 is: 10,943.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,445.94 : 30,672.24 = 7,294.78 : x
  2. Step 2: Convert to fraction form
    20,445.94/30,672.24 = 7,294.78/x
  3. Step 3: Cross multiply
    20,445.94x = 30,672.24 × 7,294.78
  4. Step 4: Simplify right side
    20,445.94x = 223,747,242.91
  5. Step 5: Solve for x
    x = 223,747,242.91/20,445.94
  6. Step 6: Final answer
    x = 10,943.36

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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.