Home / 20,716.56-28,588.96-11,285.12

Finding the Fourth Proportional to 20,716.56, 28,588.96 and 11,285.12

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Solution

The fourth proportional to 20,716.56, 28,588.96 and 11,285.12 is: 15,573.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,716.56 : 28,588.96 = 11,285.12 : x
  2. Step 2: Convert to fraction form
    20,716.56/28,588.96 = 11,285.12/x
  3. Step 3: Cross multiply
    20,716.56x = 28,588.96 × 11,285.12
  4. Step 4: Simplify right side
    20,716.56x = 322,629,844.28
  5. Step 5: Solve for x
    x = 322,629,844.28/20,716.56
  6. Step 6: Final answer
    x = 15,573.52

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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.