Home / 20,489.86-28,276.54-11,537.68

Finding the Fourth Proportional to 20,489.86, 28,276.54 and 11,537.68

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Solution

The fourth proportional to 20,489.86, 28,276.54 and 11,537.68 is: 15,922.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,489.86 : 28,276.54 = 11,537.68 : x
  2. Step 2: Convert to fraction form
    20,489.86/28,276.54 = 11,537.68/x
  3. Step 3: Cross multiply
    20,489.86x = 28,276.54 × 11,537.68
  4. Step 4: Simplify right side
    20,489.86x = 326,245,670.03
  5. Step 5: Solve for x
    x = 326,245,670.03/20,489.86
  6. Step 6: Final answer
    x = 15,922.30

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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.