Home / 20,381.05-30,503.53-11,613.61

Finding the Fourth Proportional to 20,381.05, 30,503.53 and 11,613.61

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Solution

The fourth proportional to 20,381.05, 30,503.53 and 11,613.61 is: 17,381.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,381.05 : 30,503.53 = 11,613.61 : x
  2. Step 2: Convert to fraction form
    20,381.05/30,503.53 = 11,613.61/x
  3. Step 3: Cross multiply
    20,381.05x = 30,503.53 × 11,613.61
  4. Step 4: Simplify right side
    20,381.05x = 354,256,101.04
  5. Step 5: Solve for x
    x = 354,256,101.04/20,381.05
  6. Step 6: Final answer
    x = 17,381.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.