Home / 20,670.70-28,524.78-11,239.27

Finding the Fourth Proportional to 20,670.70, 28,524.78 and 11,239.27

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Solution

The fourth proportional to 20,670.70, 28,524.78 and 11,239.27 is: 15,509.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,670.70 : 28,524.78 = 11,239.27 : x
  2. Step 2: Convert to fraction form
    20,670.70/28,524.78 = 11,239.27/x
  3. Step 3: Cross multiply
    20,670.70x = 28,524.78 × 11,239.27
  4. Step 4: Simplify right side
    20,670.70x = 320,597,704.11
  5. Step 5: Solve for x
    x = 320,597,704.11/20,670.70
  6. Step 6: Final answer
    x = 15,509.77

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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.