Home / 20,588.75-28,412.61-11,157.38

Finding the Fourth Proportional to 20,588.75, 28,412.61 and 11,157.38

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Solution

The fourth proportional to 20,588.75, 28,412.61 and 11,157.38 is: 15,397.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,588.75 : 28,412.61 = 11,157.38 : x
  2. Step 2: Convert to fraction form
    20,588.75/28,412.61 = 11,157.38/x
  3. Step 3: Cross multiply
    20,588.75x = 28,412.61 × 11,157.38
  4. Step 4: Simplify right side
    20,588.75x = 317,010,286.56
  5. Step 5: Solve for x
    x = 317,010,286.56/20,588.75
  6. Step 6: Final answer
    x = 15,397.26

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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.