Home / 20,782.40-28,679.66-11,350.97

Finding the Fourth Proportional to 20,782.40, 28,679.66 and 11,350.97

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Solution

The fourth proportional to 20,782.40, 28,679.66 and 11,350.97 is: 15,664.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,782.40 : 28,679.66 = 11,350.97 : x
  2. Step 2: Convert to fraction form
    20,782.40/28,679.66 = 11,350.97/x
  3. Step 3: Cross multiply
    20,782.40x = 28,679.66 × 11,350.97
  4. Step 4: Simplify right side
    20,782.40x = 325,541,760.12
  5. Step 5: Solve for x
    x = 325,541,760.12/20,782.40
  6. Step 6: Final answer
    x = 15,664.30

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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.