Home / 20,716.48-28,579.64-13,999.66

Finding the Fourth Proportional to 20,716.48, 28,579.64 and 13,999.66

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Solution

The fourth proportional to 20,716.48, 28,579.64 and 13,999.66 is: 19,313.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,716.48 : 28,579.64 = 13,999.66 : x
  2. Step 2: Convert to fraction form
    20,716.48/28,579.64 = 13,999.66/x
  3. Step 3: Cross multiply
    20,716.48x = 28,579.64 × 13,999.66
  4. Step 4: Simplify right side
    20,716.48x = 400,105,242.92
  5. Step 5: Solve for x
    x = 400,105,242.92/20,716.48
  6. Step 6: Final answer
    x = 19,313.38

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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.