Home / 20,089.78-27,720.98-11,137.28

Finding the Fourth Proportional to 20,089.78, 27,720.98 and 11,137.28

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Solution

The fourth proportional to 20,089.78, 27,720.98 and 11,137.28 is: 15,367.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,089.78 : 27,720.98 = 11,137.28 : x
  2. Step 2: Convert to fraction form
    20,089.78/27,720.98 = 11,137.28/x
  3. Step 3: Cross multiply
    20,089.78x = 27,720.98 × 11,137.28
  4. Step 4: Simplify right side
    20,089.78x = 308,736,316.13
  5. Step 5: Solve for x
    x = 308,736,316.13/20,089.78
  6. Step 6: Final answer
    x = 15,367.83

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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.