Home / 20,639.86-28,491.72-13,934.56

Finding the Fourth Proportional to 20,639.86, 28,491.72 and 13,934.56

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Solution

The fourth proportional to 20,639.86, 28,491.72 and 13,934.56 is: 19,235.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,639.86 : 28,491.72 = 13,934.56 : x
  2. Step 2: Convert to fraction form
    20,639.86/28,491.72 = 13,934.56/x
  3. Step 3: Cross multiply
    20,639.86x = 28,491.72 × 13,934.56
  4. Step 4: Simplify right side
    20,639.86x = 397,019,697.44
  5. Step 5: Solve for x
    x = 397,019,697.44/20,639.86
  6. Step 6: Final answer
    x = 19,235.59

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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.