Home / 20,716.28-28,588.48-11,284.88

Finding the Fourth Proportional to 20,716.28, 28,588.48 and 11,284.88

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Solution

The fourth proportional to 20,716.28, 28,588.48 and 11,284.88 is: 15,573.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,716.28 : 28,588.48 = 11,284.88 : x
  2. Step 2: Convert to fraction form
    20,716.28/28,588.48 = 11,284.88/x
  3. Step 3: Cross multiply
    20,716.28x = 28,588.48 × 11,284.88
  4. Step 4: Simplify right side
    20,716.28x = 322,617,566.18
  5. Step 5: Solve for x
    x = 322,617,566.18/20,716.28
  6. Step 6: Final answer
    x = 15,573.14

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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.