Home / 20,518.96-28,317-11,566.84

Finding the Fourth Proportional to 20,518.96, 28,317 and 11,566.84

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Solution

The fourth proportional to 20,518.96, 28,317 and 11,566.84 is: 15,962.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,518.96 : 28,317 = 11,566.84 : x
  2. Step 2: Convert to fraction form
    20,518.96/28,317 = 11,566.84/x
  3. Step 3: Cross multiply
    20,518.96x = 28,317 × 11,566.84
  4. Step 4: Simplify right side
    20,518.96x = 327,538,208.28
  5. Step 5: Solve for x
    x = 327,538,208.28/20,518.96
  6. Step 6: Final answer
    x = 15,962.71

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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.