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Finding the Fourth Proportional to 15,123.44, 20,865.84 and 11,969.84

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Solution

The fourth proportional to 15,123.44, 20,865.84 and 11,969.84 is: 16,514.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,123.44 : 20,865.84 = 11,969.84 : x
  2. Step 2: Convert to fraction form
    15,123.44/20,865.84 = 11,969.84/x
  3. Step 3: Cross multiply
    15,123.44x = 20,865.84 × 11,969.84
  4. Step 4: Simplify right side
    15,123.44x = 249,760,766.27
  5. Step 5: Solve for x
    x = 249,760,766.27/15,123.44
  6. Step 6: Final answer
    x = 16,514.81

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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.