Home / 20,320.50-28,043.62-11,369.54

Finding the Fourth Proportional to 20,320.50, 28,043.62 and 11,369.54

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Solution

The fourth proportional to 20,320.50, 28,043.62 and 11,369.54 is: 15,690.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,320.50 : 28,043.62 = 11,369.54 : x
  2. Step 2: Convert to fraction form
    20,320.50/28,043.62 = 11,369.54/x
  3. Step 3: Cross multiply
    20,320.50x = 28,043.62 × 11,369.54
  4. Step 4: Simplify right side
    20,320.50x = 318,843,059.33
  5. Step 5: Solve for x
    x = 318,843,059.33/20,320.50
  6. Step 6: Final answer
    x = 15,690.71

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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.