Home / 20,489.65-28,275.44-11,538.03

Finding the Fourth Proportional to 20,489.65, 28,275.44 and 11,538.03

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Solution

The fourth proportional to 20,489.65, 28,275.44 and 11,538.03 is: 15,922.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,489.65 : 28,275.44 = 11,538.03 : x
  2. Step 2: Convert to fraction form
    20,489.65/28,275.44 = 11,538.03/x
  3. Step 3: Cross multiply
    20,489.65x = 28,275.44 × 11,538.03
  4. Step 4: Simplify right side
    20,489.65x = 326,242,874.98
  5. Step 5: Solve for x
    x = 326,242,874.98/20,489.65
  6. Step 6: Final answer
    x = 15,922.33

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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.