Home / 20,716.90-28,589.33-11,285.46

Finding the Fourth Proportional to 20,716.90, 28,589.33 and 11,285.46

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Solution

The fourth proportional to 20,716.90, 28,589.33 and 11,285.46 is: 15,573.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,716.90 : 28,589.33 = 11,285.46 : x
  2. Step 2: Convert to fraction form
    20,716.90/28,589.33 = 11,285.46/x
  3. Step 3: Cross multiply
    20,716.90x = 28,589.33 × 11,285.46
  4. Step 4: Simplify right side
    20,716.90x = 322,643,768.36
  5. Step 5: Solve for x
    x = 322,643,768.36/20,716.90
  6. Step 6: Final answer
    x = 15,573.94

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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.