Home / 20,087.08-27,720.10-11,255.08

Finding the Fourth Proportional to 20,087.08, 27,720.10 and 11,255.08

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Solution

The fourth proportional to 20,087.08, 27,720.10 and 11,255.08 is: 15,531.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,087.08 : 27,720.10 = 11,255.08 : x
  2. Step 2: Convert to fraction form
    20,087.08/27,720.10 = 11,255.08/x
  3. Step 3: Cross multiply
    20,087.08x = 27,720.10 × 11,255.08
  4. Step 4: Simplify right side
    20,087.08x = 311,991,943.11
  5. Step 5: Solve for x
    x = 311,991,943.11/20,087.08
  6. Step 6: Final answer
    x = 15,531.97

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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.