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Finding the Fourth Proportional to 20,160.88, 27,821.80 and 11,208.08

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Solution

The fourth proportional to 20,160.88, 27,821.80 and 11,208.08 is: 15,467.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,160.88 : 27,821.80 = 11,208.08 : x
  2. Step 2: Convert to fraction form
    20,160.88/27,821.80 = 11,208.08/x
  3. Step 3: Cross multiply
    20,160.88x = 27,821.80 × 11,208.08
  4. Step 4: Simplify right side
    20,160.88x = 311,828,960.14
  5. Step 5: Solve for x
    x = 311,828,960.14/20,160.88
  6. Step 6: Final answer
    x = 15,467.03

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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.