Home / 20,770.48-28,662.87-11,339.11

Finding the Fourth Proportional to 20,770.48, 28,662.87 and 11,339.11

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Solution

The fourth proportional to 20,770.48, 28,662.87 and 11,339.11 is: 15,647.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,770.48 : 28,662.87 = 11,339.11 : x
  2. Step 2: Convert to fraction form
    20,770.48/28,662.87 = 11,339.11/x
  3. Step 3: Cross multiply
    20,770.48x = 28,662.87 × 11,339.11
  4. Step 4: Simplify right side
    20,770.48x = 325,011,435.85
  5. Step 5: Solve for x
    x = 325,011,435.85/20,770.48
  6. Step 6: Final answer
    x = 15,647.76

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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.