Home / 20,856.28-28,781.58-11,296.12

Finding the Fourth Proportional to 20,856.28, 28,781.58 and 11,296.12

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Solution

The fourth proportional to 20,856.28, 28,781.58 and 11,296.12 is: 15,588.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,856.28 : 28,781.58 = 11,296.12 : x
  2. Step 2: Convert to fraction form
    20,856.28/28,781.58 = 11,296.12/x
  3. Step 3: Cross multiply
    20,856.28x = 28,781.58 × 11,296.12
  4. Step 4: Simplify right side
    20,856.28x = 325,120,181.47
  5. Step 5: Solve for x
    x = 325,120,181.47/20,856.28
  6. Step 6: Final answer
    x = 15,588.60

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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.