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Finding the Fourth Proportional to 20,452.79, 30,684.12 and 7,123.84

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Solution

The fourth proportional to 20,452.79, 30,684.12 and 7,123.84 is: 10,687.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,452.79 : 30,684.12 = 7,123.84 : x
  2. Step 2: Convert to fraction form
    20,452.79/30,684.12 = 7,123.84/x
  3. Step 3: Cross multiply
    20,452.79x = 30,684.12 × 7,123.84
  4. Step 4: Simplify right side
    20,452.79x = 218,588,673.07
  5. Step 5: Solve for x
    x = 218,588,673.07/20,452.79
  6. Step 6: Final answer
    x = 10,687.47

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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.