Home / 20,782.56-28,679.52-11,351.04

Finding the Fourth Proportional to 20,782.56, 28,679.52 and 11,351.04

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Solution

The fourth proportional to 20,782.56, 28,679.52 and 11,351.04 is: 15,664.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,782.56 : 28,679.52 = 11,351.04 : x
  2. Step 2: Convert to fraction form
    20,782.56/28,679.52 = 11,351.04/x
  3. Step 3: Cross multiply
    20,782.56x = 28,679.52 × 11,351.04
  4. Step 4: Simplify right side
    20,782.56x = 325,542,378.70
  5. Step 5: Solve for x
    x = 325,542,378.70/20,782.56
  6. Step 6: Final answer
    x = 15,664.21

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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.