Home / 20,770.96-28,666.44-11,820.64

Finding the Fourth Proportional to 20,770.96, 28,666.44 and 11,820.64

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Solution

The fourth proportional to 20,770.96, 28,666.44 and 11,820.64 is: 16,313.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,770.96 : 28,666.44 = 11,820.64 : x
  2. Step 2: Convert to fraction form
    20,770.96/28,666.44 = 11,820.64/x
  3. Step 3: Cross multiply
    20,770.96x = 28,666.44 × 11,820.64
  4. Step 4: Simplify right side
    20,770.96x = 338,855,667.32
  5. Step 5: Solve for x
    x = 338,855,667.32/20,770.96
  6. Step 6: Final answer
    x = 16,313.91

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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.