Home / 19,880.25-27,431.78-11,381.03

Finding the Fourth Proportional to 19,880.25, 27,431.78 and 11,381.03

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Solution

The fourth proportional to 19,880.25, 27,431.78 and 11,381.03 is: 15,704.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,880.25 : 27,431.78 = 11,381.03 : x
  2. Step 2: Convert to fraction form
    19,880.25/27,431.78 = 11,381.03/x
  3. Step 3: Cross multiply
    19,880.25x = 27,431.78 × 11,381.03
  4. Step 4: Simplify right side
    19,880.25x = 312,201,911.13
  5. Step 5: Solve for x
    x = 312,201,911.13/19,880.25
  6. Step 6: Final answer
    x = 15,704.12

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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.