Home / 20,716.12-28,587.36-11,284.72

Finding the Fourth Proportional to 20,716.12, 28,587.36 and 11,284.72

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Solution

The fourth proportional to 20,716.12, 28,587.36 and 11,284.72 is: 15,572.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,716.12 : 28,587.36 = 11,284.72 : x
  2. Step 2: Convert to fraction form
    20,716.12/28,587.36 = 11,284.72/x
  3. Step 3: Cross multiply
    20,716.12x = 28,587.36 × 11,284.72
  4. Step 4: Simplify right side
    20,716.12x = 322,600,353.14
  5. Step 5: Solve for x
    x = 322,600,353.14/20,716.12
  6. Step 6: Final answer
    x = 15,572.43

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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.