Home / 20,282.87-27,990.42-11,330.72

Finding the Fourth Proportional to 20,282.87, 27,990.42 and 11,330.72

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Solution

The fourth proportional to 20,282.87, 27,990.42 and 11,330.72 is: 15,636.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,282.87 : 27,990.42 = 11,330.72 : x
  2. Step 2: Convert to fraction form
    20,282.87/27,990.42 = 11,330.72/x
  3. Step 3: Cross multiply
    20,282.87x = 27,990.42 × 11,330.72
  4. Step 4: Simplify right side
    20,282.87x = 317,151,611.70
  5. Step 5: Solve for x
    x = 317,151,611.70/20,282.87
  6. Step 6: Final answer
    x = 15,636.43

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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.