Home / 20,782.13-28,679.33-11,350.71

Finding the Fourth Proportional to 20,782.13, 28,679.33 and 11,350.71

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Solution

The fourth proportional to 20,782.13, 28,679.33 and 11,350.71 is: 15,663.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,782.13 : 28,679.33 = 11,350.71 : x
  2. Step 2: Convert to fraction form
    20,782.13/28,679.33 = 11,350.71/x
  3. Step 3: Cross multiply
    20,782.13x = 28,679.33 × 11,350.71
  4. Step 4: Simplify right side
    20,782.13x = 325,530,786.20
  5. Step 5: Solve for x
    x = 325,530,786.20/20,782.13
  6. Step 6: Final answer
    x = 15,663.98

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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.