Home / 20,826.72-28,742.85-11,396.70

Finding the Fourth Proportional to 20,826.72, 28,742.85 and 11,396.70

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Solution

The fourth proportional to 20,826.72, 28,742.85 and 11,396.70 is: 15,728.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,826.72 : 28,742.85 = 11,396.70 : x
  2. Step 2: Convert to fraction form
    20,826.72/28,742.85 = 11,396.70/x
  3. Step 3: Cross multiply
    20,826.72x = 28,742.85 × 11,396.70
  4. Step 4: Simplify right side
    20,826.72x = 327,573,638.60
  5. Step 5: Solve for x
    x = 327,573,638.60/20,826.72
  6. Step 6: Final answer
    x = 15,728.53

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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.