Home / 20,774.56-28,682.64-12,828.46

Finding the Fourth Proportional to 20,774.56, 28,682.64 and 12,828.46

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Solution

The fourth proportional to 20,774.56, 28,682.64 and 12,828.46 is: 17,711.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,774.56 : 28,682.64 = 12,828.46 : x
  2. Step 2: Convert to fraction form
    20,774.56/28,682.64 = 12,828.46/x
  3. Step 3: Cross multiply
    20,774.56x = 28,682.64 × 12,828.46
  4. Step 4: Simplify right side
    20,774.56x = 367,954,099.93
  5. Step 5: Solve for x
    x = 367,954,099.93/20,774.56
  6. Step 6: Final answer
    x = 17,711.76

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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.