Home / 20,972.62-28,942.35-11,412.59

Finding the Fourth Proportional to 20,972.62, 28,942.35 and 11,412.59

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Solution

The fourth proportional to 20,972.62, 28,942.35 and 11,412.59 is: 15,749.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,972.62 : 28,942.35 = 11,412.59 : x
  2. Step 2: Convert to fraction form
    20,972.62/28,942.35 = 11,412.59/x
  3. Step 3: Cross multiply
    20,972.62x = 28,942.35 × 11,412.59
  4. Step 4: Simplify right side
    20,972.62x = 330,306,972.41
  5. Step 5: Solve for x
    x = 330,306,972.41/20,972.62
  6. Step 6: Final answer
    x = 15,749.44

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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.