Home / 20,655.56-28,508.82-12,270.44

Finding the Fourth Proportional to 20,655.56, 28,508.82 and 12,270.44

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Solution

The fourth proportional to 20,655.56, 28,508.82 and 12,270.44 is: 16,935.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,655.56 : 28,508.82 = 12,270.44 : x
  2. Step 2: Convert to fraction form
    20,655.56/28,508.82 = 12,270.44/x
  3. Step 3: Cross multiply
    20,655.56x = 28,508.82 × 12,270.44
  4. Step 4: Simplify right side
    20,655.56x = 349,815,765.28
  5. Step 5: Solve for x
    x = 349,815,765.28/20,655.56
  6. Step 6: Final answer
    x = 16,935.67

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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.