Home / 20,739.04-28,620.42-12,786.52

Finding the Fourth Proportional to 20,739.04, 28,620.42 and 12,786.52

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Solution

The fourth proportional to 20,739.04, 28,620.42 and 12,786.52 is: 17,645.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,739.04 : 28,620.42 = 12,786.52 : x
  2. Step 2: Convert to fraction form
    20,739.04/28,620.42 = 12,786.52/x
  3. Step 3: Cross multiply
    20,739.04x = 28,620.42 × 12,786.52
  4. Step 4: Simplify right side
    20,739.04x = 365,955,572.74
  5. Step 5: Solve for x
    x = 365,955,572.74/20,739.04
  6. Step 6: Final answer
    x = 17,645.73

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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.