Home / 20,381.75-28,126.81-11,884.23

Finding the Fourth Proportional to 20,381.75, 28,126.81 and 11,884.23

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Solution

The fourth proportional to 20,381.75, 28,126.81 and 11,884.23 is: 16,400.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,381.75 : 28,126.81 = 11,884.23 : x
  2. Step 2: Convert to fraction form
    20,381.75/28,126.81 = 11,884.23/x
  3. Step 3: Cross multiply
    20,381.75x = 28,126.81 × 11,884.23
  4. Step 4: Simplify right side
    20,381.75x = 334,265,479.21
  5. Step 5: Solve for x
    x = 334,265,479.21/20,381.75
  6. Step 6: Final answer
    x = 16,400.23

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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.