Home / 20,716.12-28,579.12-13,999.28

Finding the Fourth Proportional to 20,716.12, 28,579.12 and 13,999.28

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Solution

The fourth proportional to 20,716.12, 28,579.12 and 13,999.28 is: 19,312.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,716.12 : 28,579.12 = 13,999.28 : x
  2. Step 2: Convert to fraction form
    20,716.12/28,579.12 = 13,999.28/x
  3. Step 3: Cross multiply
    20,716.12x = 28,579.12 × 13,999.28
  4. Step 4: Simplify right side
    20,716.12x = 400,087,103.03
  5. Step 5: Solve for x
    x = 400,087,103.03/20,716.12
  6. Step 6: Final answer
    x = 19,312.84

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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.